Enable Windows Flash hw video decode trial.

chrome/browser/chrome_browser_field_trials_desktop.cc

Index: chrome/browser/chrome_browser_field_trials_desktop.cc
===================================================================
--- chrome/browser/chrome_browser_field_trials_desktop.cc	(revision 246096)
+++ chrome/browser/chrome_browser_field_trials_desktop.cc	(working copy)
@@ -67,15 +67,24 @@
     trial->Disable();
 }
 
-void SetupLowLatencyFlashAudioFieldTrial() {
+void SetupFlashHardwareVideoDecodeFieldTrial() {
+#if defined(OS_WIN)
+  // End this trial on a patch Tuesday.
   scoped_refptr<base::FieldTrial> trial(
       base::FieldTrialList::FactoryGetFieldTrial(
-          content::kLowLatencyFlashAudioFieldTrialName, 100, "Standard",
-          2013, 9, 1, base::FieldTrial::SESSION_RANDOMIZED, NULL));
+          content::kFlashHwVideoDecodeFieldTrialName, 100, "Standard",
+          2014, 6, 10, base::FieldTrial::ONE_TIME_RANDOMIZED, NULL));

[Alexei Svitkine (slow), 2014/01/22 16:27:24]

It's better to initialize field trials entirely from the server, unless there's
a really good reason against that (which I don't think there is in this case).

If the trial is set up from the server, then this block of code is not needed at
all and can be removed.

 
-  // Trial is enabled for dev / beta / canary users only.
-  if (chrome::VersionInfo::GetChannel() != chrome::VersionInfo::CHANNEL_STABLE)
-    trial->AppendGroup(content::kLowLatencyFlashAudioFieldTrialEnabledName, 25);
+  // Hardware decode is enabled for Windows canary/dev/unbranded users. On beta
+  // channel it is enabled with 50% and on stable with 1% probability.
+  chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
+  if (channel == chrome::VersionInfo::CHANNEL_STABLE)
+      trial->AppendGroup(content::kFlashHwVideoDecodeFieldTrialEnabledName, 1);
+  else if (channel == chrome::VersionInfo::CHANNEL_BETA)
+    trial->AppendGroup(content::kFlashHwVideoDecodeFieldTrialEnabledName, 50);
+  else
+    trial->AppendGroup(content::kFlashHwVideoDecodeFieldTrialEnabledName, 100);
+#endif  // defined(OS_WIN)
 }
 
 void SetupPreReadFieldTrial() {
@@ -133,7 +142,7 @@
   SetupInfiniteCacheFieldTrial();
   DisableShowProfileSwitcherTrialIfNecessary();
   SetupShowAppLauncherPromoFieldTrial(local_state);
-  SetupLowLatencyFlashAudioFieldTrial();
+  SetupFlashHardwareVideoDecodeFieldTrial();
   SetupPreReadFieldTrial();
 }