Add GL strings to CastSysInfo interface and use to configure GPU

chromecast/browser/cast_browser_main_parts.cc

Index: chromecast/browser/cast_browser_main_parts.cc
diff --git a/chromecast/browser/cast_browser_main_parts.cc b/chromecast/browser/cast_browser_main_parts.cc
index 45edf44d13197469e5dcf302f1364e341e19a9b4..3b1e1e2ca58ce04719804dc300e3039d1939da40 100644
--- a/chromecast/browser/cast_browser_main_parts.cc
+++ b/chromecast/browser/cast_browser_main_parts.cc
@@ -17,6 +17,7 @@
 #include "base/run_loop.h"
 #include "cc/base/switches.h"
 #include "chromecast/base/cast_paths.h"
+#include "chromecast/base/cast_sys_info_util.h"
 #include "chromecast/base/metrics/cast_metrics_helper.h"
 #include "chromecast/base/metrics/grouped_histogram.h"
 #include "chromecast/browser/cast_browser_context.h"
@@ -30,7 +31,9 @@
 #include "chromecast/common/chromecast_switches.h"
 #include "chromecast/common/platform_client_auth.h"
 #include "chromecast/net/connectivity_checker.h"
+#include "chromecast/public/cast_sys_info.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/gpu_data_manager.h"
 #include "content/public/common/content_switches.h"
 #include "media/base/browser_cdm_factory.h"
 #include "media/base/media_switches.h"
@@ -254,6 +257,13 @@ int CastBrowserMainParts::PreCreateThreads() {
 }
 
 void CastBrowserMainParts::PreMainMessageLoopRun() {
+  // Set GL strings so GPU config code can make correct feature blacklisting/
+  // whitelisting decisions.
+  scoped_ptr<CastSysInfo> sys_info = CreateSysInfo();
+  content::GpuDataManager::GetInstance()->SetGLStrings(

[Zhenyao Mo, 2015/05/01 18:12:03]

Please add a comment here that this has to be called after
content::GpuDataManager::Initialize(). In case someone in the future moves this
around to break the contract.

[gunsch, 2015/05/01 18:23:44]

I don't suppose we have a public API via which we can assert that GpuDataManager
is initialized by this point?

+      sys_info->GetGlVendor(), sys_info->GetGlRenderer(),
+      sys_info->GetGlVersion());
+
   scoped_refptr<PrefRegistrySimple> pref_registry(new PrefRegistrySimple());
   metrics::RegisterPrefs(pref_registry.get());
   cast_browser_process_->SetPrefService(