Remove WebGraphicsContext3D getter from cc::ContextProvider

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index 5f443eefa531a48cecaaa34e07acde27de178392..949fa67f10b085196754b348c328098913e9f6b4 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -40,7 +40,6 @@
 #include "gpu/command_buffer/client/context_support.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
-#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ -55,7 +54,6 @@
 #include "ui/gfx/quad_f.h"
 #include "ui/gfx/rect_conversions.h"
 
-using blink::WebGraphicsContext3D;
 using gpu::gles2::GLES2Interface;
 
 namespace cc {
@@ -166,7 +164,6 @@ GLRenderer::GLRenderer(RendererClient* client,
     : DirectRenderer(client, settings, output_surface, resource_provider),
       offscreen_framebuffer_id_(0),
       shared_geometry_quad_(gfx::RectF(-0.5f, -0.5f, 1.0f, 1.0f)),
-      context_(output_surface->context_provider()->Context3d()),
       gl_(output_surface->context_provider()->ContextGL()),
       context_support_(output_surface->context_provider()->ContextSupport()),
       texture_mailbox_deleter_(texture_mailbox_deleter),
@@ -226,8 +223,6 @@ const RendererCapabilities& GLRenderer::Capabilities() const {
   return capabilities_;
 }
 
-WebGraphicsContext3D* GLRenderer::Context() { return context_; }
-
 void GLRenderer::DebugGLCall(GLES2Interface* gl,
                              const char* command,
                              const char* file,