Move bindToCurrentThread out to the creators of WebGL contexts.

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 93e1b10faba9cf7e125089b9f6259c081b9d0824..85b8fb8bab4fc60f174356b6d8f3dbda8f3cdbc7 100644
--- a/content/renderer/renderer_blink_platform_impl.h
+++ b/content/renderer/renderer_blink_platform_impl.h
@@ -182,8 +182,7 @@ class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl {
       const blink::Platform::ContextAttributes& attributes,
       const blink::WebURL& top_document_web_url,
       blink::WebGraphicsContext3DProvider* share_provider,
-      blink::Platform::GraphicsInfo* gl_info,
-      blink::Platform::WillBindToCurrentThread) override;
+      blink::Platform::GraphicsInfo* gl_info) override;
   blink::WebGraphicsContext3DProvider*
   createSharedOffscreenGraphicsContext3DProvider() override;
   blink::WebCompositorSupport* compositorSupport() override;