Allow creating GLImage-backed textures with glTexStorage2D.

cc/resources/resource_provider.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_RESOURCES_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 55 matching lines @@
   struct Resource;
 
  public:
   using ResourceIdArray = std::vector<ResourceId>;
   using ResourceIdMap = std::unordered_map<ResourceId, ResourceId>;
   enum TextureHint {
     TEXTURE_HINT_DEFAULT = 0x0,
     TEXTURE_HINT_IMMUTABLE = 0x1,
     TEXTURE_HINT_FRAMEBUFFER = 0x2,
     TEXTURE_HINT_IMMUTABLE_FRAMEBUFFER =
-        TEXTURE_HINT_IMMUTABLE | TEXTURE_HINT_FRAMEBUFFER
+        TEXTURE_HINT_IMMUTABLE | TEXTURE_HINT_FRAMEBUFFER,
+    TEXTURE_HINT_IMAGE = 0x4
   };
   enum ResourceType {
     RESOURCE_TYPE_GPU_MEMORY_BUFFER,
     RESOURCE_TYPE_GL_TEXTURE,
     RESOURCE_TYPE_BITMAP,
   };
 
   ResourceProvider(ContextProvider* compositor_context_provider,
                    SharedBitmapManager* shared_bitmap_manager,
                    gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
@@ skipping 723 matching lines @@
   // Set of resource Ids that would like to be notified about promotion hints.
   ResourceIdSet wants_promotion_hints_set_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_