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..51c0e1d69d378f2d11a160c6523bc6aed3f768da 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -542,10 +542,12 @@ 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;
+  const gfx::DeviceDisplayInfo& display_info =
+      nativeWindow->GetDeviceDisplayInfo();
   size_t full_screen_texture_size_in_bytes =
       display_info.GetDisplayHeight() *
       display_info.GetDisplayWidth() *
@@ -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());