Make WebView work for external displays (over Presentations).

content/browser/renderer_host/compositor_impl_android.cc

Index: content/browser/renderer_host/compositor_impl_android.cc
diff --git a/content/browser/renderer_host/compositor_impl_android.cc b/content/browser/renderer_host/compositor_impl_android.cc
index 4a120522049c0c01aeef71edcda3fd2649765f83..23829a43ae0cbb29e623aed0a51cb82b44d88814 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -542,13 +542,15 @@ static scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
 CreateGpuProcessViewContext(
     const scoped_refptr<GpuChannelHost>& gpu_channel_host,
     const blink::WebGraphicsContext3D::Attributes attributes,
-    int surface_id) {
+    int surface_id,
+    gfx::NativeWindow nativeWindow) {
   GURL url("chrome://gpu/Compositor::createContext3D");
   static const size_t kBytesPerPixel = 4;
-  gfx::DeviceDisplayInfo display_info;
+  std::shared_ptr<gfx::DeviceDisplayInfo>
+      display_info(nativeWindow->GetDeviceDisplayInfo());
   size_t full_screen_texture_size_in_bytes =
-      display_info.GetDisplayHeight() *
-      display_info.GetDisplayWidth() *
+      display_info->GetDisplayHeight() *
+      display_info->GetDisplayWidth() *
       kBytesPerPixel;
   WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits limits;
   limits.command_buffer_size = 64 * 1024;
@@ -643,7 +645,8 @@ void CompositorImpl::CreateOutputSurface() {
   scoped_refptr<GpuChannelHost> gpu_channel_host(factory->GetGpuChannel());
   scoped_refptr<ContextProviderCommandBuffer> context_provider(
       ContextProviderCommandBuffer::Create(
-          CreateGpuProcessViewContext(gpu_channel_host, attrs, surface_id_),
+          CreateGpuProcessViewContext(gpu_channel_host, attrs, surface_id_,
+            root_window_),
           BROWSER_COMPOSITOR_ONSCREEN_CONTEXT));
   DCHECK(context_provider.get());