Add half-float IOSurface GpuMemoryBuffer support

cc/resources/resource_provider.cc

 // 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.
 
 #include "cc/resources/resource_provider.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 561 matching lines @@
 }
 
 ResourceId ResourceProvider::CreateResource(
     const gfx::Size& size,
     TextureHint hint,
     ResourceFormat format,
     const gfx::ColorSpace& color_space) {
   DCHECK(!size.IsEmpty());
   switch (settings_.default_resource_type) {
     case RESOURCE_TYPE_GPU_MEMORY_BUFFER:
-      // GPU memory buffers don't support LUMINANCE_F16 or RGBA_F16 yet.
-      if (format != LUMINANCE_F16 && format != RGBA_F16) {
+      // GPU memory buffers don't support LUMINANCE_F16 yet.
+      if (format != LUMINANCE_F16) {
         return CreateGLTexture(
             size, hint, RESOURCE_TYPE_GPU_MEMORY_BUFFER, format,
             gfx::BufferUsage::GPU_READ_CPU_READ_WRITE, color_space);
       }
     // Fall through and use a regular texture.
     case RESOURCE_TYPE_GL_TEXTURE:
       return CreateGLTexture(size, hint, RESOURCE_TYPE_GL_TEXTURE, format,
                              gfx::BufferUsage::GPU_READ_CPU_READ_WRITE,
                              color_space);
 
@@ skipping 1603 matching lines @@
 
     const int kImportance = 2;
     pmd->CreateSharedGlobalAllocatorDump(guid);
     pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
   }
 
   return true;
 }
 
 }  // namespace cc