gpu: Add CHROMIUM_texture_from_image spec and fence support.

ui/gl/gl_image.h

Index: ui/gl/gl_image.h
diff --git a/ui/gl/gl_image.h b/ui/gl/gl_image.h
index 44680193317aad5c031eff3ca9381ef83fac0e0f..f2537689f0e0d07f1bedc674c205f52ff169064e 100644
--- a/ui/gl/gl_image.h
+++ b/ui/gl/gl_image.h
@@ -26,6 +26,7 @@ class ProcessMemoryDump;
 }
 
 namespace gl {
+class GLFence;
 
 // Encapsulates an image that can be bound and/or copied to a texture, hiding
 // platform specific management.
@@ -41,7 +42,7 @@ class GL_EXPORT GLImage : public base::RefCounted<GLImage> {
 
   // Bind image to texture currently bound to |target|. Returns true on success.
   // It is valid for an implementation to always return false.
-  virtual bool BindTexImage(unsigned target) = 0;
+  virtual bool BindTexImage(unsigned target, GLFence* fence) = 0;
 
   // Release image from texture currently bound to |target|.
   virtual void ReleaseTexImage(unsigned target) = 0;