Actually clear the disk cache, and keep it enabled, between benchmark runs.

Fixes a small TODO in the benchmarking extension. Keep the disk cache
turned on during benchmarking, and doom all entries between benchmark
runs, rather than disabling it entirely.

BUG=none
TEST=All tests pass.

Review URL: http://codereview.chromium.org/669115

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@48994 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 12 insertions, 0 deletions

diff --git a/chrome/renderer/render_thread.cc b/chrome/renderer/render_thread.cc
index 767fc37..d69de4d 100644..100755
--- a/chrome/renderer/render_thread.cc
+++ b/chrome/renderer/render_thread.cc
@@ -693,6 +693,11 @@ void RenderThread::SetCacheMode(bool enabled) {
   Send(new ViewHostMsg_SetCacheMode(enabled));
 }
 
+void RenderThread::ClearCache() {
+  int rv;
+  Send(new ViewHostMsg_ClearCache(&rv));
+}
+
 void RenderThread::UpdateActiveExtensions() {
   // In single-process mode, the browser process reports the active extensions.
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSingleProcess))
diff --git a/chrome/renderer/render_thread.h b/chrome/renderer/render_thread.h
index a02a0b9..d59f4ff 100644..100755
--- a/chrome/renderer/render_thread.h
+++ b/chrome/renderer/render_thread.h
@@ -174,6 +174,9 @@ class RenderThread : public RenderThreadBase,
   // Sends a message to the browser to enable or disable the disk cache.
   void SetCacheMode(bool enabled);
 
+  // Sends a message to the browser to clear the disk cache.
+  void ClearCache();
+
   // Update the list of active extensions that will be reported when we crash.
   void UpdateActiveExtensions();
 
diff --git a/chrome/renderer/renderer_glue.cc b/chrome/renderer/renderer_glue.cc
index c2b4d0d..87c9049 100644..100755
--- a/chrome/renderer/renderer_glue.cc
+++ b/chrome/renderer/renderer_glue.cc
@@ -268,6 +268,10 @@ void SetCacheMode(bool enabled) {
   RenderThread::current()->SetCacheMode(enabled);
 }
 
+void ClearCache() {
+  RenderThread::current()->ClearCache();
+}
+
 std::string GetProductVersion() {
   scoped_ptr<FileVersionInfo> version_info(
       chrome_app::GetChromeVersionInfo());