Revert of Modify data_reduction_proxy_header to support tamper detection logic. (https://codereview.chromium.org/387353003/)

Reason for revert:
Causes DataReductionProxyHeadersTest.GetDataReductionProxyHeaderWithFingerprintRemoved to timeout on the bots.

TBR=bengr1@chromium.org, tonyg@chromium.org, bolian@chromium.org, yfriedman@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=381907

Original issue's description:
> 1. Adds action-parsing functionality for data reduction proxy header.
> 
> 2. Adds a couple of functions to return different fingerprint value for tamper detection.
> 
> 3. Adds a function to remove Chrome-Proxy header's fingerprint from its header values, and return the rest of header values.
> 
> 4. Changes HasDataReductionProxyViaHeader to also tell 
> whether data reduction proxy Via header occurs at the last 
> or not.
> 
> 
> BUG=381907
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287561

Review URL: https://codereview.chromium.org/444723003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287608 0039d316-1c4b-4281-b951-d872f2087c98

6 files changed, 21 insertions, 545 deletions

diff --git a/chrome/browser/android/intercept_download_resource_throttle.cc b/chrome/browser/android/intercept_download_resource_throttle.cc
index 721ed3d..1101b1e 100644
--- a/chrome/browser/android/intercept_download_resource_throttle.cc
+++ b/chrome/browser/android/intercept_download_resource_throttle.cc
@@ -62,7 +62,7 @@ void InterceptDownloadResourceThrottle::ProcessDownloadRequest() {
     if (headers.HasHeader(net::HttpRequestHeaders::kAuthorization) ||
         !(request_->response_info().headers &&
             data_reduction_proxy::HasDataReductionProxyViaHeader(
-                request_->response_info().headers, NULL))) {
+                request_->response_info().headers))) {
       return;
     }
 #else
diff --git a/chrome/renderer/page_load_histograms.cc b/chrome/renderer/page_load_histograms.cc
index 8360428..21dd2ef 100644
--- a/chrome/renderer/page_load_histograms.cc
+++ b/chrome/renderer/page_load_histograms.cc
@@ -177,8 +177,7 @@ bool DataReductionProxyWasUsed(WebFrame* frame) {
   std::replace(headers.begin(), headers.end(), '\n', '\0');
   scoped_refptr<net::HttpResponseHeaders> response_headers(
       new net::HttpResponseHeaders(headers));
-  return data_reduction_proxy::HasDataReductionProxyViaHeader(
-      response_headers, NULL);
+  return data_reduction_proxy::HasDataReductionProxyViaHeader(response_headers);
 }
 
 // Returns true if the provided URL is a referrer string that came from
diff --git a/components/data_reduction_proxy/browser/data_reduction_proxy_metrics.cc b/components/data_reduction_proxy/browser/data_reduction_proxy_metrics.cc
index 795dbea..2093d84 100644
--- a/components/data_reduction_proxy/browser/data_reduction_proxy_metrics.cc
+++ b/components/data_reduction_proxy/browser/data_reduction_proxy_metrics.cc
@@ -315,7 +315,7 @@ DataReductionProxyRequestType GetDataReductionProxyRequestType(
   }
 #endif
   if (request->response_info().headers &&
-      HasDataReductionProxyViaHeader(request->response_info().headers, NULL)) {
+      HasDataReductionProxyViaHeader(request->response_info().headers)) {
     return VIA_DATA_REDUCTION_PROXY;
   }
   return UNKNOWN_TYPE;
diff --git a/components/data_reduction_proxy/common/data_reduction_proxy_headers.cc b/components/data_reduction_proxy/common/data_reduction_proxy_headers.cc
index ebd48c4..d97c35c 100644
--- a/components/data_reduction_proxy/common/data_reduction_proxy_headers.cc
+++ b/components/data_reduction_proxy/common/data_reduction_proxy_headers.cc
@@ -21,18 +21,6 @@ using net::ProxyService;
 
 namespace {
 
-const char kChromeProxyHeader[] = "chrome-proxy";
-const char kActionValueDelimiter = '=';
-
-const char kChromeProxyActionBlock[] = "block";
-const char kChromeProxyActionBypass[] = "bypass";
-
-// Actions for tamper detection fingerprints.
-const char kChromeProxyActionFingerprintChromeProxy[]   = "fcp";
-const char kChromeProxyActionFingerprintVia[]           = "fvia";
-const char kChromeProxyActionFingerprintOtherHeaders[]  = "foh";
-const char kChromeProxyActionFingerprintContentLength[] = "fcl";
-
 const int kShortBypassMaxSeconds = 59;
 const int kMediumBypassMaxSeconds = 300;
 
@@ -47,51 +35,21 @@ base::TimeDelta GetDefaultBypassDuration() {
 
 namespace data_reduction_proxy {
 
-bool GetDataReductionProxyActionValue(
-    const net::HttpResponseHeaders* headers,
-    const std::string& action_prefix,
-    std::string* action_value) {
-  DCHECK(headers);
-  DCHECK(!action_prefix.empty());
-  // A valid action does not include a trailing '='.
-  DCHECK(action_prefix[action_prefix.size() - 1] != kActionValueDelimiter);
-  void* iter = NULL;
-  std::string value;
-  std::string prefix = action_prefix + kActionValueDelimiter;
-
-  while (headers->EnumerateHeader(&iter, kChromeProxyHeader, &value)) {
-    if (value.size() > prefix.size()) {
-      if (LowerCaseEqualsASCII(value.begin(),
-                               value.begin() + prefix.size(),
-                               prefix.c_str())) {
-        if (action_value)
-          *action_value = value.substr(prefix.size());
-        return true;
-      }
-    }
-  }
-  return false;
-}
-
 bool ParseHeadersAndSetBypassDuration(const net::HttpResponseHeaders* headers,
                                       const std::string& action_prefix,
                                       base::TimeDelta* bypass_duration) {
-  DCHECK(headers);
-  DCHECK(!action_prefix.empty());
-  // A valid action does not include a trailing '='.
-  DCHECK(action_prefix[action_prefix.size() - 1] != kActionValueDelimiter);
   void* iter = NULL;
   std::string value;
-  std::string prefix = action_prefix + kActionValueDelimiter;
+  std::string name = "chrome-proxy";
 
-  while (headers->EnumerateHeader(&iter, kChromeProxyHeader, &value)) {
-    if (value.size() > prefix.size()) {
+  while (headers->EnumerateHeader(&iter, name, &value)) {
+    if (value.size() > action_prefix.size()) {
       if (LowerCaseEqualsASCII(value.begin(),
-                               value.begin() + prefix.size(),
-                               prefix.c_str())) {
+                               value.begin() + action_prefix.size(),
+                               action_prefix.c_str())) {
         int64 seconds;
         if (!base::StringToInt64(
-                StringPiece(value.begin() + prefix.size(), value.end()),
+                StringPiece(value.begin() + action_prefix.size(), value.end()),
                 &seconds) || seconds < 0) {
           continue;  // In case there is a well formed instruction.
         }
@@ -124,21 +82,20 @@ bool ParseHeadersAndSetProxyInfo(const net::HttpResponseHeaders* headers,
   // 'block' takes precedence over 'bypass', so look for it first.
   // TODO(bengr): Reduce checks for 'block' and 'bypass' to a single loop.
   if (ParseHeadersAndSetBypassDuration(
-          headers, kChromeProxyActionBlock, &proxy_info->bypass_duration)) {
+          headers, "block=", &proxy_info->bypass_duration)) {
     proxy_info->bypass_all = true;
     return true;
   }
 
   // Next, look for 'bypass'.
   if (ParseHeadersAndSetBypassDuration(
-          headers, kChromeProxyActionBypass, &proxy_info->bypass_duration)) {
+          headers, "bypass=", &proxy_info->bypass_duration)) {
     return true;
   }
   return false;
 }
 
-bool HasDataReductionProxyViaHeader(const net::HttpResponseHeaders* headers,
-                                    bool* has_intermediary) {
+bool HasDataReductionProxyViaHeader(const net::HttpResponseHeaders* headers) {
   const size_t kVersionSize = 4;
   const char kDataReductionProxyViaValue[] = "Chrome-Compression-Proxy";
   size_t value_len = strlen(kDataReductionProxyViaValue);
@@ -150,13 +107,8 @@ bool HasDataReductionProxyViaHeader(const net::HttpResponseHeaders* headers,
   // 'Via: 1.1 Chrome-Compression-Proxy'
   while (headers->EnumerateHeader(&iter, "via", &value)) {
     if (value.size() >= kVersionSize + value_len &&
-        !value.compare(kVersionSize, value_len, kDataReductionProxyViaValue)) {
-      if (has_intermediary)
-        // We assume intermediary exists if there is another Via header after
-        // the data reduction proxy's Via header.
-        *has_intermediary = !(headers->EnumerateHeader(&iter, "via", &value));
+        !value.compare(kVersionSize, value_len, kDataReductionProxyViaValue))
       return true;
-    }
   }
 
   // TODO(bengr): Remove deprecated header value.
@@ -164,11 +116,8 @@ bool HasDataReductionProxyViaHeader(const net::HttpResponseHeaders* headers,
       "1.1 Chrome Compression Proxy";
   iter = NULL;
   while (headers->EnumerateHeader(&iter, "via", &value))
-    if (value == kDeprecatedDataReductionProxyViaValue) {
-      if (has_intermediary)
-        *has_intermediary = !(headers->EnumerateHeader(&iter, "via", &value));
+    if (value == kDeprecatedDataReductionProxyViaValue)
       return true;
-    }
 
   return false;
 }
@@ -202,7 +151,7 @@ GetDataReductionProxyBypassType(
       !headers->HasHeader("Proxy-Authenticate")) {
     return ProxyService::MALFORMED_407;
   }
-  if (!HasDataReductionProxyViaHeader(headers, NULL) &&
+  if (!HasDataReductionProxyViaHeader(headers) &&
       (headers->response_code() != net::HTTP_NOT_MODIFIED)) {
     // A Via header might not be present in a 304. Since the goal of a 304
     // response is to minimize information transfer, a sender in general
@@ -221,59 +170,4 @@ GetDataReductionProxyBypassType(
   return ProxyService::BYPASS_EVENT_TYPE_MAX;
 }
 
-bool GetDataReductionProxyActionFingerprintChromeProxy(
-    const net::HttpResponseHeaders* headers,
-    std::string* chrome_proxy_fingerprint) {
-  return GetDataReductionProxyActionValue(
-      headers,
-      kChromeProxyActionFingerprintChromeProxy,
-      chrome_proxy_fingerprint);
-}
-
-bool GetDataReductionProxyActionFingerprintVia(
-    const net::HttpResponseHeaders* headers,
-    std::string* via_fingerprint) {
-  return GetDataReductionProxyActionValue(
-      headers,
-      kChromeProxyActionFingerprintVia,
-      via_fingerprint);
-}
-
-bool GetDataReductionProxyActionFingerprintOtherHeaders(
-    const net::HttpResponseHeaders* headers,
-    std::string* other_headers_fingerprint) {
-  return GetDataReductionProxyActionValue(
-      headers,
-      kChromeProxyActionFingerprintOtherHeaders,
-      other_headers_fingerprint);
-}
-
-bool GetDataReductionProxyActionFingerprintContentLength(
-    const net::HttpResponseHeaders* headers,
-    std::string* content_length_fingerprint) {
-  return GetDataReductionProxyActionValue(
-      headers,
-      kChromeProxyActionFingerprintContentLength,
-      content_length_fingerprint);
-}
-
-void GetDataReductionProxyHeaderWithFingerprintRemoved(
-    const net::HttpResponseHeaders* headers,
-    std::vector<std::string>* values) {
-  DCHECK(values);
-  std::string chrome_proxy_fingerprint_prefix = std::string(
-      kChromeProxyActionFingerprintChromeProxy) + kActionValueDelimiter;
-
-  std::string value;
-  void* iter = NULL;
-  while (headers->EnumerateHeader(&iter, kChromeProxyHeader, &value)) {
-    if (!LowerCaseEqualsASCII(
-        value.begin(),
-        value.begin() + chrome_proxy_fingerprint_prefix.size(),
-        chrome_proxy_fingerprint_prefix.c_str())) {
-      values->push_back(value);
-    }
-  }
-}
-
 }  // namespace data_reduction_proxy
diff --git a/components/data_reduction_proxy/common/data_reduction_proxy_headers.h b/components/data_reduction_proxy/common/data_reduction_proxy_headers.h
index 319d90d..28eccee 100644
--- a/components/data_reduction_proxy/common/data_reduction_proxy_headers.h
+++ b/components/data_reduction_proxy/common/data_reduction_proxy_headers.h
@@ -41,12 +41,8 @@ bool ParseHeadersAndSetProxyInfo(const net::HttpResponseHeaders* headers,
                                  DataReductionProxyInfo* proxy_info);
 
 // Returns true if the response contains the data reduction proxy Via header
-// value. If non-NULL, sets |has_intermediary| to true if another server added
-// a Via header after the data reduction proxy, and to false otherwise. Used to
-// check the integrity of data reduction proxy responses and whether there are
-// other middleboxes between the data reduction proxy and the client.
-bool HasDataReductionProxyViaHeader(const net::HttpResponseHeaders* headers,
-                                    bool* has_intermediary);
+// value. Used to check the integrity of data reduction proxy responses.
+bool HasDataReductionProxyViaHeader(const net::HttpResponseHeaders* headers);
 
 // Returns the reason why the Chrome proxy should be bypassed or not, and
 // populates |proxy_info| with information on how long to bypass if
@@ -55,44 +51,11 @@ net::ProxyService::DataReductionProxyBypassType GetDataReductionProxyBypassType(
     const net::HttpResponseHeaders* headers,
     DataReductionProxyInfo* proxy_info);
 
-// Searches for the specified Chrome-Proxy action, and if present saves its
-// value as a string in |action_value|. Only returns the first one and ignores
-// the rest if multiple actions match |action_prefix|.
-bool GetDataReductionProxyActionValue(
-    const net::HttpResponseHeaders* headers,
-    const std::string& action_prefix,
-    std::string* action_value);
-
 // Searches for the specified Chrome-Proxy action, and if present interprets
 // its value as a duration in seconds.
 bool ParseHeadersAndSetBypassDuration(const net::HttpResponseHeaders* headers,
                                       const std::string& action_prefix,
                                       base::TimeDelta* bypass_duration);
 
-// Gets the fingerprint of the Chrome-Proxy header.
-bool GetDataReductionProxyActionFingerprintChromeProxy(
-    const net::HttpResponseHeaders* headers,
-    std::string* chrome_proxy_fingerprint);
-
-// Gets the fingerprint of the Via header.
-bool GetDataReductionProxyActionFingerprintVia(
-    const net::HttpResponseHeaders* headers,
-    std::string* via_fingerprint);
-
-// Gets the fingerprint of a list of headers.
-bool GetDataReductionProxyActionFingerprintOtherHeaders(
-    const net::HttpResponseHeaders* headers,
-    std::string* other_headers_fingerprint);
-
-// Gets the fingerprint of Content-Length header.
-bool GetDataReductionProxyActionFingerprintContentLength(
-    const net::HttpResponseHeaders* headers,
-    std::string* content_length_fingerprint);
-
-// Returns values of the Chrome-Proxy header, but with its fingerprint removed.
-void GetDataReductionProxyHeaderWithFingerprintRemoved(
-    const net::HttpResponseHeaders* headers,
-    std::vector<std::string>* values);
-
 }  // namespace data_reduction_proxy
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_COMMON_DATA_REDUCTION_PROXY_HEADERS_H_
diff --git a/components/data_reduction_proxy/common/data_reduction_proxy_headers_unittest.cc b/components/data_reduction_proxy/common/data_reduction_proxy_headers_unittest.cc
index 6a98dd1..ef3de65 100644
--- a/components/data_reduction_proxy/common/data_reduction_proxy_headers_unittest.cc
+++ b/components/data_reduction_proxy/common/data_reduction_proxy_headers_unittest.cc
@@ -24,92 +24,6 @@ namespace data_reduction_proxy {
 
 class DataReductionProxyHeadersTest : public testing::Test {};
 
-TEST_F(DataReductionProxyHeadersTest, GetDataReductionProxyActionValue) {
-  const struct {
-     const char* headers;
-     std::string action_key;
-     bool expected_result;
-     std::string expected_action_value;
-  } tests[] = {
-    { "HTTP/1.1 200 OK\n"
-      "Content-Length: 999\n",
-      "a",
-      false,
-      "",
-    },
-    { "HTTP/1.1 200 OK\n"
-      "connection: keep-alive\n"
-      "Content-Length: 999\n",
-      "a",
-      false,
-      "",
-    },
-    { "HTTP/1.1 200 OK\n"
-      "connection: keep-alive\n"
-      "Chrome-Proxy: bypass=86400\n"
-      "Content-Length: 999\n",
-      "bypass",
-      true,
-      "86400",
-    },
-    { "HTTP/1.1 200 OK\n"
-      "connection: keep-alive\n"
-      "Chrome-Proxy: bypass86400\n"
-      "Content-Length: 999\n",
-      "bypass",
-      false,
-      "",
-    },
-    { "HTTP/1.1 200 OK\n"
-      "connection: keep-alive\n"
-      "Chrome-Proxy: bypass=0\n"
-      "Content-Length: 999\n",
-      "bypass",
-      true,
-      "0",
-    },
-    { "HTTP/1.1 200 OK\n"
-      "connection: keep-alive\n"
-      "Chrome-Proxy: bypass=1500\n"
-      "Chrome-Proxy: bypass=86400\n"
-      "Content-Length: 999\n",
-      "bypass",
-      true,
-      "1500",
-    },
-    { "HTTP/1.1 200 OK\n"
-      "connection: keep-alive\n"
-      "Chrome-Proxy: block=1500, block=3600\n"
-      "Content-Length: 999\n",
-      "block",
-      true,
-      "1500",
-    },
-    { "HTTP/1.1 200 OK\n"
-      "connection: proxy-bypass\n"
-      "Chrome-Proxy:    key=123   \n"
-      "Content-Length: 999\n",
-      "key",
-      true,
-      "123",
-    },
-  };
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
-    std::string headers(tests[i].headers);
-    HeadersToRaw(&headers);
-    scoped_refptr<net::HttpResponseHeaders> parsed(
-        new net::HttpResponseHeaders(headers));
-
-    std::string action_value;
-    bool has_action_key = GetDataReductionProxyActionValue(
-        parsed, tests[i].action_key, &action_value);
-    EXPECT_EQ(tests[i].expected_result, has_action_key);
-    if (has_action_key) {
-      EXPECT_EQ(tests[i].expected_action_value, action_value);
-    }
-  }
-}
-
 TEST_F(DataReductionProxyHeadersTest, GetProxyBypassInfo) {
   const struct {
      const char* headers;
@@ -288,117 +202,66 @@ TEST_F(DataReductionProxyHeadersTest, ParseHeadersAndSetProxyInfo) {
 
 TEST_F(DataReductionProxyHeadersTest, HasDataReductionProxyViaHeader) {
   const struct {
-    const char* headers;
-    bool expected_result;
-    bool expected_has_intermediary;
-    bool ignore_intermediary;
+     const char* headers;
+     bool expected_result;
   } tests[] = {
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 Chrome-Proxy\n",
       false,
-      false,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1\n",
       false,
-      false,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 Chrome-Compression-Proxy\n",
       true,
-      true,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.0 Chrome-Compression-Proxy\n",
       true,
-      true,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 Foo-Bar, 1.1 Chrome-Compression-Proxy\n",
       true,
-      true,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 Chrome-Compression-Proxy, 1.1 Bar-Foo\n",
       true,
-      false,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 chrome-compression-proxy\n",
       false,
-      false,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 Foo-Bar\n"
       "Via: 1.1 Chrome-Compression-Proxy\n",
       true,
-      true,
-      false,
-    },
-    { "HTTP/1.1 200 OK\n"
-      "Via: 1.1 Chrome-Compression-Proxy\n"
-      "Via: 1.1 Foo-Bar\n",
-      true,
-      false,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 Chrome-Proxy\n",
       false,
-      false,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 Chrome Compression Proxy\n",
       true,
-      true,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 Foo-Bar, 1.1 Chrome Compression Proxy\n",
       true,
-      true,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 Chrome Compression Proxy, 1.1 Bar-Foo\n",
       true,
-      false,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 chrome compression proxy\n",
       false,
-      false,
-      false,
     },
     { "HTTP/1.1 200 OK\n"
       "Via: 1.1 Foo-Bar\n"
       "Via: 1.1 Chrome Compression Proxy\n",
       true,
-      true,
-      false,
-    },
-    { "HTTP/1.1 200 OK\n"
-      "Via: 1.1 Chrome Compression Proxy\n"
-      "Via: 1.1 Foo-Bar\n",
-      true,
-      false,
-      false,
-    },
-    { "HTTP/1.1 200 OK\n"
-      "Via: 1.1 Chrome Compression Proxy\n"
-      "Via: 1.1 Foo-Bar\n",
-      true,
-      false,
-      true,
     },
   };
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
@@ -407,19 +270,8 @@ TEST_F(DataReductionProxyHeadersTest, HasDataReductionProxyViaHeader) {
     scoped_refptr<net::HttpResponseHeaders> parsed(
         new net::HttpResponseHeaders(headers));
 
-    bool has_chrome_proxy_via_header, has_intermediary;
-    if (tests[i].ignore_intermediary) {
-      has_chrome_proxy_via_header =
-          HasDataReductionProxyViaHeader(parsed, NULL);
-    }
-    else {
-      has_chrome_proxy_via_header =
-          HasDataReductionProxyViaHeader(parsed, &has_intermediary);
-    }
-    EXPECT_EQ(tests[i].expected_result, has_chrome_proxy_via_header);
-    if (has_chrome_proxy_via_header && !tests[i].ignore_intermediary) {
-      EXPECT_EQ(tests[i].expected_has_intermediary, has_intermediary);
-    }
+    EXPECT_EQ(tests[i].expected_result,
+              HasDataReductionProxyViaHeader(parsed));
   }
 }
 
@@ -529,236 +381,4 @@ TEST_F(DataReductionProxyHeadersTest, GetDataReductionProxyBypassEventType) {
               GetDataReductionProxyBypassType(parsed, &chrome_proxy_info));
   }
 }
-
-TEST_F(DataReductionProxyHeadersTest,
-       GetDataReductionProxyActionFingerprintChromeProxy) {
-  const struct {
-     std::string label;
-     const char* headers;
-     bool expected_fingerprint_exist;
-     std::string expected_fingerprint;
-  } tests[] = {
-    { "fingerprint doesn't exist",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=0\n",
-      false,
-      "",
-    },
-    { "fingerprint occurs once",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=1, fcp=fp\n",
-      true,
-      "fp",
-    },
-    { "fingerprint occurs twice",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=2, fcp=fp1, fcp=fp2\n",
-      true,
-      "fp1",
-    },
-  };
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
-    std::string headers(tests[i].headers);
-    HeadersToRaw(&headers);
-    scoped_refptr<net::HttpResponseHeaders> parsed(
-        new net::HttpResponseHeaders(headers));
-
-    std::string fingerprint;
-    bool fingerprint_exist = GetDataReductionProxyActionFingerprintChromeProxy(
-        parsed, &fingerprint);
-    EXPECT_EQ(tests[i].expected_fingerprint_exist, fingerprint_exist)
-        << tests[i].label;
-
-    if (fingerprint_exist)
-      EXPECT_EQ(tests[i].expected_fingerprint, fingerprint) << tests[i].label;
-  }
-}
-
-TEST_F(DataReductionProxyHeadersTest,
-       GetDataReductionProxyActionFingerprintVia) {
-  const struct {
-     std::string label;
-     const char* headers;
-     bool expected_fingerprint_exist;
-     std::string expected_fingerprint;
-  } tests[] = {
-    { "fingerprint doesn't exist",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=0\n",
-      false,
-      "",
-    },
-    { "fingerprint occurs once",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=1, fvia=fvia\n",
-      true,
-      "fvia",
-    },
-    { "fingerprint occurs twice",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=2, fvia=fvia1, fvia=fvia2\n",
-      true,
-      "fvia1",
-    },
-  };
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
-    std::string headers(tests[i].headers);
-    HeadersToRaw(&headers);
-    scoped_refptr<net::HttpResponseHeaders> parsed(
-        new net::HttpResponseHeaders(headers));
-
-    std::string fingerprint;
-    bool fingerprint_exist =
-        GetDataReductionProxyActionFingerprintVia(parsed, &fingerprint);
-    EXPECT_EQ(tests[i].expected_fingerprint_exist, fingerprint_exist)
-        << tests[i].label;
-
-    if (fingerprint_exist)
-      EXPECT_EQ(tests[i].expected_fingerprint, fingerprint) << tests[i].label;
-  }
-}
-
-TEST_F(DataReductionProxyHeadersTest,
-       GetDataReductionProxyActionFingerprintOtherHeaders) {
-  const struct {
-     std::string label;
-     const char* headers;
-     bool expected_fingerprint_exist;
-     std::string expected_fingerprint;
-  } tests[] = {
-    { "fingerprint doesn't exist",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=0\n",
-      false,
-      "",
-    },
-    { "fingerprint occurs once",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=1, foh=foh\n",
-      true,
-      "foh",
-    },
-    { "fingerprint occurs twice",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=2, foh=foh1, foh=foh2\n",
-      true,
-      "foh1",
-    },
-  };
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
-    std::string headers(tests[i].headers);
-    HeadersToRaw(&headers);
-    scoped_refptr<net::HttpResponseHeaders> parsed(
-        new net::HttpResponseHeaders(headers));
-
-    std::string fingerprint;
-    bool fingerprint_exist =
-        GetDataReductionProxyActionFingerprintOtherHeaders(
-        parsed, &fingerprint);
-    EXPECT_EQ(tests[i].expected_fingerprint_exist, fingerprint_exist)
-        << tests[i].label;
-
-    if (fingerprint_exist)
-      EXPECT_EQ(tests[i].expected_fingerprint, fingerprint) << tests[i].label;
-  }
-}
-
-TEST_F(DataReductionProxyHeadersTest,
-       GetDataReductionProxyActionFingerprintContentLength) {
-  const struct {
-     std::string label;
-     const char* headers;
-     bool expected_fingerprint_exist;
-     std::string expected_fingerprint;
-  } tests[] = {
-    { "fingerprint doesn't exist",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=0\n",
-      false,
-      "",
-    },
-    { "fingerprint occurs once",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=1, fcl=fcl\n",
-      true,
-      "fcl",
-    },
-    { "fingerprint occurs twice",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: bypass=2, fcl=fcl1, fcl=fcl2\n",
-      true,
-      "fcl1",
-    },
-  };
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
-    std::string headers(tests[i].headers);
-    HeadersToRaw(&headers);
-    scoped_refptr<net::HttpResponseHeaders> parsed(
-        new net::HttpResponseHeaders(headers));
-
-    std::string fingerprint;
-    bool fingerprint_exist =
-        GetDataReductionProxyActionFingerprintContentLength(
-        parsed, &fingerprint);
-    EXPECT_EQ(tests[i].expected_fingerprint_exist, fingerprint_exist)
-        << tests[i].label;
-
-    if (fingerprint_exist)
-      EXPECT_EQ(tests[i].expected_fingerprint, fingerprint) << tests[i].label;
-  }
-}
-
-TEST_F(DataReductionProxyHeadersTest,
-       GetDataReductionProxyHeaderWithFingerprintRemoved) {
-  struct {
-    std::string label;
-    const char* headers;
-    std::string expected_output_values_string;
-  } test[] = {
-    {
-      "Checks the case that there is no Chrome-Proxy header's fingerprint.",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: 1,2,3,5\n",
-      "1,2,3,5,",
-    },
-    {
-      "Checks the case that there is Chrome-Proxy header's fingerprint.",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: 1,2,3,fcp=4,5\n",
-      "1,2,3,5,",
-    },
-    {
-      "Checks the case that there is Chrome-Proxy header's fingerprint, and it"
-      "occurs at the end.",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: 1,2,3,fcp=4,",
-      "1,2,3,",
-    },
-    {
-      "Checks the case that there is Chrome-Proxy header's fingerprint, and it"
-      "occurs at the beginning.",
-      "HTTP/1.1 200 OK\n"
-      "Chrome-Proxy: fcp=1,2,3,",
-      "2,3,",
-    },
-  };
-
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test); ++i) {
-    std::string headers(test[i].headers);
-    HeadersToRaw(&headers);
-    scoped_refptr<net::HttpResponseHeaders> parsed(
-        new net::HttpResponseHeaders(headers));
-
-    std::vector<std::string> output_values;
-    GetDataReductionProxyHeaderWithFingerprintRemoved(parsed, &output_values);
-
-    std::string output_values_string;
-    for (size_t j = 0; j < output_values.size(); ++j)
-      output_values_string += output_values[j] + ",";
-
-    EXPECT_EQ(test[i].expected_output_values_string, output_values_string)
-        << test[i].label;
-  }
-}
-
 }  // namespace data_reduction_proxy