<video> use cache if --enable-byte-range-support is present

BUG=16013
TEST=Playing a video should still work with the flag in incognito mode or not.

Allow <video> to use cache if running with experimental byte range support.

Review URL: http://codereview.chromium.org/253001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@27589 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 21 insertions, 4 deletions

diff --git a/webkit/glue/media/buffered_data_source.cc b/webkit/glue/media/buffered_data_source.cc
index 6efaa8c..63a3777 100644
--- a/webkit/glue/media/buffered_data_source.cc
+++ b/webkit/glue/media/buffered_data_source.cc
@@ -110,10 +110,12 @@ void BufferedResourceLoader::Start(net::CompletionCallback* start_callback) {
 
   // Creates the bridge on render thread since we can only access
   // ResourceDispatcher on this thread.
-  bridge_.reset(bridge_factory_->CreateBridge(url_,
-                                              net::LOAD_BYPASS_CACHE,
-                                              first_byte_position_,
-                                              last_byte_position_));
+  bridge_.reset(
+      bridge_factory_->CreateBridge(
+          url_,
+          IsMediaCacheEnabled() ? net::LOAD_NORMAL : net::LOAD_BYPASS_CACHE,
+          first_byte_position_,
+          last_byte_position_));
 
   // Increment the reference count right before we start the request. This
   // reference will be release when this request has ended.
diff --git a/webkit/glue/webkit_glue.cc b/webkit/glue/webkit_glue.cc
index 92e62a3..77289d1 100644
--- a/webkit/glue/webkit_glue.cc
+++ b/webkit/glue/webkit_glue.cc
@@ -479,4 +479,14 @@ int GetGlyphPageCount() {
   return WebCore::GlyphPageTreeNode::treeGlyphPageCount();
 }
 
+bool g_enable_media_cache = false;
+
+bool IsMediaCacheEnabled() {
+  return g_enable_media_cache;
+}
+
+void SetMediaCacheEnabled(bool enabled) {
+  g_enable_media_cache = enabled;
+}
+
 } // namespace webkit_glue
diff --git a/webkit/glue/webkit_glue.h b/webkit/glue/webkit_glue.h
index 73fbe6b..1874510 100644
--- a/webkit/glue/webkit_glue.h
+++ b/webkit/glue/webkit_glue.h
@@ -122,6 +122,11 @@ WebKit::WebCanvas* ToWebCanvas(skia::PlatformCanvas*);
 // used to get memory usage statistics.
 int GetGlyphPageCount();
 
+// Methods to query and enable media cache.
+// TODO(hclam): Remove these methods when the cache is stable enough.
+bool IsMediaCacheEnabled();
+void SetMediaCacheEnabled(bool enabled);
+
 //---- END FUNCTIONS IMPLEMENTED BY WEBKIT/GLUE -------------------------------