Disable accelerated 2D canvas on DX9 by not initializing GraphicsContext3D if it can be lost.

chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc

Index: chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc
diff --git a/chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc b/chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc
index 1ffd0fe11c866c5c2f135e394222ca272e1fc506..19ced5ace7c81149b4d8f2e4fd128a3ede9fdc32 100644
--- a/chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc
+++ b/chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc
@@ -87,6 +87,12 @@ bool WebGraphicsContext3DCommandBufferImpl::initialize(
     ggl::GGL_NONE,
   };
 
+  if (attributes.canRecoverFromContextLoss == false) {

[jamesr, 2010/11/10 21:22:01]

nit: if (!attributes.canRecoverFromContextLoss)

+    GPUInfo gpu_info = host->gpu_info();
+    if (gpu_info.can_lose_context())
+        return false;
+  }
+
   if (render_directly_to_web_view) {
     RenderView* renderview = RenderView::FromWebView(web_view);
     if (!renderview)