gpu: Move buffer format to target texture map into gpu host.

ui/compositor/compositor.cc

 // Copyright (c) 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 "ui/compositor/compositor.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <deque>
@@ skipping 159 matching lines @@
 
   // Populate buffer_to_texture_target_map for all buffer usage/formats.
   for (int usage_idx = 0; usage_idx <= static_cast<int>(gfx::BufferUsage::LAST);
        ++usage_idx) {
     gfx::BufferUsage usage = static_cast<gfx::BufferUsage>(usage_idx);
     for (int format_idx = 0;
          format_idx <= static_cast<int>(gfx::BufferFormat::LAST);
          ++format_idx) {
       gfx::BufferFormat format = static_cast<gfx::BufferFormat>(format_idx);
       uint32_t target = context_factory_->GetImageTextureTarget(format, usage);
-      settings.renderer_settings.buffer_to_texture_target_map.insert(
-          cc::BufferToTextureTargetMap::value_type(
-              cc::BufferToTextureTargetKey(usage, format), target));
+      settings.renderer_settings
+          .buffer_to_texture_target_map[std::make_pair(usage, format)] = target;
     }
   }
 
   // Note: Only enable image decode tasks if we have more than one worker
   // thread.
   settings.image_decode_tasks_enabled = false;
 
   settings.gpu_memory_policy.bytes_limit_when_visible = 512 * 1024 * 1024;
   settings.gpu_memory_policy.priority_cutoff_when_visible =
       gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE;
@@ skipping 365 matching lines @@
   for (auto& observer : observer_list_)
     observer.OnCompositingLockStateChanged(this);
 }
 
 void Compositor::CancelCompositorLock() {
   if (compositor_lock_)
     compositor_lock_->CancelLock();
 }
 
 }  // namespace ui