Revert "Add a RWH_TabSwitchPaintDuration histogram."

Causes tab_switching_test to go red.  Reverting this commit
which is part of the investigation.

BUG=4104
TEST=tab_switching_test goes green

Review URL: http://codereview.chromium.org/384049

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@31683 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 20 insertions, 22 deletions

diff --git a/chrome/test/tab_switching/tab_switching_test.cc b/chrome/test/tab_switching/tab_switching_test.cc
index 4576fe6..d23bef9 100644
--- a/chrome/test/tab_switching/tab_switching_test.cc
+++ b/chrome/test/tab_switching/tab_switching_test.cc
@@ -25,7 +25,7 @@ namespace {
 // time taken for each switch. It then prints out the times on the console,
 // with the aim that the page cycler parser can interpret these numbers to
 // draw graphs for page cycler Tab Switching Performance.
-// Usage Flags: --enable-logging --dump-histograms-on-exit --log-level=0
+// Usage Flags: -enable-logging -dump-histograms-on-exit -log-level=0
 class TabSwitchingUITest : public UITest {
  public:
   TabSwitchingUITest() {
@@ -61,7 +61,7 @@ class TabSwitchingUITest : public UITest {
     EXPECT_TRUE(CloseBrowser(browser_proxy_.get(), &application_closed));
 
     // Now open the corresponding log file and collect average and std dev from
-    // the histogram stats generated for RenderWidgetHost_TabSwitchPaintDuration
+    // the histogram stats generated for RenderWidgetHostHWND_WhiteoutDuration
     FilePath log_file_name;
     ASSERT_TRUE(PathService::Get(chrome::DIR_LOGS, &log_file_name));
     log_file_name = log_file_name.AppendASCII("chrome_debug.log");
@@ -82,28 +82,26 @@ class TabSwitchingUITest : public UITest {
     const std::string average_str("average = ");
     const std::string std_dev_str("standard deviation = ");
     std::string::size_type pos = contents.find(
-        "Histogram: MPArch.RWH_TabSwitchPaintDuration", 0);
+        "Histogram: MPArch.RWHH_WhiteoutDuration", 0);
     std::string::size_type comma_pos;
     std::string::size_type number_length;
-
-    // Verify we found the TabSwitchPaintDuration histogram.
-    ASSERT_NE(pos, std::string::npos) <<
-        "Histogram: MPArch.RWH_TabSwitchPaintDuration wasn't found\n" <<
-        contents;
-
-    // Get the average.
-    pos = contents.find(average_str, pos);
-    comma_pos = contents.find(",", pos);
-    pos += average_str.length();
-    number_length = comma_pos - pos;
-    average = contents.substr(pos, number_length);
-
-    // Get the std dev.
-    pos = contents.find(std_dev_str, pos);
-    pos += std_dev_str.length();
-    comma_pos = contents.find(" ", pos);
-    number_length = comma_pos - pos;
-    std_dev = contents.substr(pos, number_length);
+    if (pos != std::string::npos) {
+      // Get the average.
+      pos = contents.find(average_str, pos);
+      comma_pos = contents.find(",", pos);
+      pos += average_str.length();
+      number_length = comma_pos - pos;
+      average = contents.substr(pos, number_length);
+
+      // Get the std dev.
+      pos = contents.find(std_dev_str, pos);
+      pos += std_dev_str.length();
+      comma_pos = contents.find(" ", pos);
+      number_length = comma_pos - pos;
+      std_dev = contents.substr(pos, number_length);
+    } else {
+      LOG(WARNING) << "Histogram: MPArch.RWHH_WhiteoutDuration wasn't found";
+    }
 
     // Print the average and standard deviation.
     PrintResultMeanAndError("tab_switch", "", "t",