Revert of Enabling included files when reloading local NTP with --local-ntp-reload. (patchset #7 id:120001 of https://codereview.chromium.org/1376243005/ )

Reason for revert:
Break iOS Device ninja Build Bot

https://build.chromium.org/p/chromium.mac/builders/iOS_Device_%28ninja%29/builds/29414

Compilation failed as

In file included from ../../chrome/browser/search/local_files_ntp_source.cc:19:
../../third_party/re2/re2/re2.h:186:10: fatal error: 're2/stringpiece.h' file not found
#include "re2/stringpiece.h"

which is added in this CL.

Original issue's description:
> Enabling included files when reloading local NTP with --local-ntp-reload.

TBR=fserb@chromium.org,mathp@chromium.org,tmartino@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1442793002

Cr-Commit-Position: refs/heads/master@{#359364}

1 files changed, 1 insertions, 55 deletions

diff --git a/chrome/browser/search/local_files_ntp_source.cc b/chrome/browser/search/local_files_ntp_source.cc
index 16350a4..cb017d9 100644
--- a/chrome/browser/search/local_files_ntp_source.cc
+++ b/chrome/browser/search/local_files_ntp_source.cc
@@ -16,16 +16,11 @@
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/url_data_source.h"
-#include "third_party/re2/re2/re2.h"
-#include "third_party/re2/re2/stringpiece.h"
 
 namespace {
 
 const char kBasePath[] = "chrome/browser/resources/local_ntp";
 
-// Matches lines of form '<include src="foo">' and captures 'foo'.
-const char kInlineResourceRegex[] = "<include.*?src\\=[\"'](.+?)[\"'].*?>";
-
 void CallbackWithLoadedResource(
     const std::string& origin,
     const content::URLDataSource::GotDataCallback& callback,
@@ -52,53 +47,6 @@ std::string ReadFileAndReturn(const base::FilePath& path) {
 
 namespace local_ntp {
 
-void FlattenLocalInclude(
-    const content::URLDataSource::GotDataCallback& callback,
-    std::string topLevelResource,
-    base::RefCountedMemory* inlineResource);
-
-// Helper method invoked by both CheckLocalIncludes and FlattenLocalInclude.
-// Checks for any <include> directives; if any are found, loads the associated
-// file and calls FlattenLocalInclude with the result. Otherwise, processing
-// is done, and so the original callback is invoked.
-void CheckLocalIncludesHelper(
-    const content::URLDataSource::GotDataCallback& callback,
-    std::string& resource) {
-  std::string filename;
-  re2::StringPiece resourceWrapper(resource);
-  if (re2::RE2::FindAndConsume(&resourceWrapper, kInlineResourceRegex,
-                               &filename)) {
-    content::URLDataSource::GotDataCallback wrapper =
-        base::Bind(&FlattenLocalInclude, callback, resource);
-    SendLocalFileResource(filename, wrapper);
-  } else {
-    callback.Run(base::RefCountedString::TakeString(&resource));
-  }
-}
-
-// Wrapper around the above helper function for use as a callback. Processes
-// local files to inline any files indicated by an <include> directive.
-void CheckLocalIncludes(
-    const content::URLDataSource::GotDataCallback& callback,
-    base::RefCountedMemory* resource) {
-  std::string resourceAsStr(resource->front_as<char>(), resource->size());
-  CheckLocalIncludesHelper(callback, resourceAsStr);
-}
-
-// Replaces the first <include> directive found with the given file contents.
-// Afterwards, re-invokes CheckLocalIncludesHelper to handle any subsequent
-// <include>s, including those which may have been added by the newly-inlined
-// resource.
-void FlattenLocalInclude(
-    const content::URLDataSource::GotDataCallback& callback,
-    std::string topLevelResource,
-    base::RefCountedMemory* inlineResource) {
-  std::string inlineAsStr(inlineResource->front_as<char>(),
-                          inlineResource->size());
-  re2::RE2::Replace(&topLevelResource, kInlineResourceRegex, inlineAsStr);
-  CheckLocalIncludesHelper(callback, topLevelResource);
-}
-
 void SendLocalFileResource(
     const std::string& path,
     const content::URLDataSource::GotDataCallback& callback) {
@@ -112,12 +60,10 @@ void SendLocalFileResourceWithOrigin(
   base::FilePath fullpath;
   PathService::Get(base::DIR_SOURCE_ROOT, &fullpath);
   fullpath = fullpath.AppendASCII(kBasePath).AppendASCII(path);
-  content::URLDataSource::GotDataCallback wrapper =
-      base::Bind(&CheckLocalIncludes, callback);
   base::PostTaskAndReplyWithResult(
       content::BrowserThread::GetBlockingPool(), FROM_HERE,
       base::Bind(&ReadFileAndReturn, fullpath),
-      base::Bind(&CallbackWithLoadedResource, origin, wrapper));
+      base::Bind(&CallbackWithLoadedResource, origin, callback));
 }
 
 }  // namespace local_ntp