gpu: FBO must be incomplete if the attached texture is not cube complete.

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 9bf440a17d03b18bd3491e859bd90c93f7108c0f..eba5f9003e6378e1690716268eb5d3ebe0fec841 100644
--- a/gpu/command_buffer/service/framebuffer_manager.h
+++ b/gpu/command_buffer/service/framebuffer_manager.h
@@ -44,6 +44,7 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
     virtual bool IsTexture(TextureRef* texture) const = 0;
     virtual bool IsRenderbuffer(
         Renderbuffer* renderbuffer) const = 0;
+    virtual bool IsAttachmentComplete(FeatureInfo* feature_info) const = 0;
     virtual bool CanRenderTo() const = 0;
     virtual void DetachFromFramebuffer(Framebuffer* framebuffer) const = 0;
     virtual bool ValidForAttachmentType(
@@ -129,7 +130,7 @@ class GPU_EXPORT Framebuffer : public base::RefCounted<Framebuffer> {
   // Note that receiving GL_FRAMEBUFFER_COMPLETE from this function does
   // not mean the real OpenGL will consider it framebuffer complete. It just
   // means it passed our tests.
-  GLenum IsPossiblyComplete() const;
+  GLenum IsPossiblyComplete(GLenum target, FeatureInfo* feature_info) const;
 
   // Implements optimized glGetFramebufferStatus.
   GLenum GetStatus(TextureManager* texture_manager, GLenum target) const;