Move special DEPTH_STENCIL attachment logic from command buffers to WebGL1

gpu/command_buffer/service/framebuffer_manager.h

Index: gpu/command_buffer/service/framebuffer_manager.h
diff --git a/gpu/command_buffer/service/framebuffer_manager.h b/gpu/command_buffer/service/framebuffer_manager.h
index e5962f7236da53e6373ea1a49269addc3f781d85..eab5809d63145562acb0564d46d59c61a454ad40 100644
--- a/gpu/command_buffer/service/framebuffer_manager.h
+++ b/gpu/command_buffer/service/framebuffer_manager.h
@@ -63,7 +63,6 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
     virtual bool CanRenderTo(const FeatureInfo* feature_info) const = 0;
     virtual void DetachFromFramebuffer(Framebuffer* framebuffer) const = 0;
     virtual bool ValidForAttachmentType(GLenum attachment_type,
-                                        ContextType context_type,
                                         uint32_t max_color_attachments) = 0;
     virtual size_t GetSignatureSize(TextureManager* texture_manager) const = 0;
     virtual void AddToSignature(
@@ -151,12 +150,6 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
   bool HasColorAttachment(int index) const;
   bool HasDepthAttachment() const;
   bool HasStencilAttachment() const;
-  // The following look at DEPTH_STENCIL_ATTACHMENT or
-  // DEPTH_ATTACHMENT/STENCIL_ATTACHMENT.
-  // TODO(piman): DEPTH_STENCIL_ATTACHMENT is not a real attachment point,
-  // except for WebGL1. Fix this.  http://crbug.com/630568
-  const Attachment* GetDepthAttachment() const;
-  const Attachment* GetStencilAttachment() const;
   GLenum GetDepthFormat() const;
   GLenum GetStencilFormat() const;
   GLenum GetDrawBufferInternalFormat() const;
@@ -316,7 +309,6 @@ class GPU_EXPORT FramebufferManager {
  public:
   FramebufferManager(uint32_t max_draw_buffers,
                      uint32_t max_color_attachments,
-                     ContextType context_type,
                      const scoped_refptr<FramebufferCompletenessCache>&
                          framebuffer_combo_complete_cache);
   ~FramebufferManager();
@@ -351,8 +343,6 @@ class GPU_EXPORT FramebufferManager {
         (framebuffer_state_change_count_ + 1) | 0x80000000U;
   }
 
-  ContextType context_type() const { return context_type_; }
-
  private:
   friend class Framebuffer;
 
@@ -381,8 +371,6 @@ class GPU_EXPORT FramebufferManager {
   uint32_t max_draw_buffers_;
   uint32_t max_color_attachments_;
 
-  ContextType context_type_;
-
   scoped_refptr<FramebufferCompletenessCache> framebuffer_combo_complete_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(FramebufferManager);