Remove WGC3D typedefs and move WebGraphicsInfo to Platform.

content/renderer/renderer_blink_platform_impl.h

Index: content/renderer/renderer_blink_platform_impl.h
diff --git a/content/renderer/renderer_blink_platform_impl.h b/content/renderer/renderer_blink_platform_impl.h
index 5893735260079dae3a146bfffcb26093f41a89af..2c05ea6608505a209483f954d3607f8c34c928b5 100644
--- a/content/renderer/renderer_blink_platform_impl.h
+++ b/content/renderer/renderer_blink_platform_impl.h
@@ -171,7 +171,7 @@ class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl {
   blink::WebGraphicsContext3DProvider* createOffscreenGraphicsContext3DProvider(
       const blink::WebGraphicsContext3D::Attributes& attributes,
       blink::WebGraphicsContext3DProvider* share_provider,
-      blink::WebGraphicsContext3D::WebGraphicsInfo* gl_info) override;
+      blink::Platform::GraphicsInfo* gl_info) override;
   blink::WebGraphicsContext3DProvider*
   createSharedOffscreenGraphicsContext3DProvider() override;
   blink::WebCompositorSupport* compositorSupport() override;