Updating the about:gpu to start a webgl context if one does not exist so that some gpu_info will actually exist. It does this by refreshing the page every 5 seconds until a context does exist, if necessary.

We also looked into other methods:
- synchronous call to create context, but that will hang if there are issues creating a context
- a call back, but that will also hang until we have a gpu context
- display no data and rely on the user to refresh which is somewhat unintuitive to the user

The method in this CL seemed to be the least annoying method of doing this which didn't cause the browser to hang.

BUG=none
TEST=visual

Review URL: http://codereview.chromium.org/3348007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@59141 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 14 insertions, 0 deletions

diff --git a/chrome/gpu/gpu_thread.cc b/chrome/gpu/gpu_thread.cc
index 2ce492c..a949e3b 100644
--- a/chrome/gpu/gpu_thread.cc
+++ b/chrome/gpu/gpu_thread.cc
@@ -86,6 +86,8 @@ void GpuThread::OnControlMessageReceived(const IPC::Message& msg) {
                         OnSynchronize)
     IPC_MESSAGE_HANDLER(GpuMsg_NewRenderWidgetHostView,
                         OnNewRenderWidgetHostView)
+    IPC_MESSAGE_HANDLER(GpuMsg_CollectGraphicsInfo,
+                        OnCollectGraphicsInfo)
   IPC_END_MESSAGE_MAP_EX()
 }
 
@@ -146,3 +148,14 @@ void GpuThread::OnNewRenderWidgetHostView(GpuNativeWindowHandle parent_window,
   NOTIMPLEMENTED();
 #endif
 }
+
+void GpuThread::OnCollectGraphicsInfo() {
+  // Fail to establish a channel if some implementation of GL cannot be
+  // initialized.
+  GPUInfo gpu_info;
+  if (gfx::GLContext::InitializeOneOff()) {
+    gpu_info_collector::CollectGraphicsInfo(&gpu_info);
+  }
+
+  Send(new GpuHostMsg_GraphicsInfoCollected(gpu_info));
+}
diff --git a/chrome/gpu/gpu_thread.h b/chrome/gpu/gpu_thread.h
index 76904c3..fb23d7f 100644
--- a/chrome/gpu/gpu_thread.h
+++ b/chrome/gpu/gpu_thread.h
@@ -41,6 +41,7 @@ class GpuThread : public ChildThread {
   // Message handlers.
   void OnEstablishChannel(int renderer_id);
   void OnSynchronize();
+  void OnCollectGraphicsInfo();
   void OnNewRenderWidgetHostView(GpuNativeWindowHandle parent_window,
                                  int32 routing_id);