Add compile time checks against longs being used in IPC structs on 32 bit Android.

content/common/android/sync_compositor_messages.h

 // Copyright 2015 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 <stddef.h>
 
 #include "base/memory/shared_memory_handle.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits.h"
 #include "content/common/input/did_overscroll_params.h"
 #include "content/common/input/input_event_ack_state.h"
 #include "ipc/ipc_message_macros.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/gfx/geometry/scroll_offset.h"
 
 #ifndef CONTENT_COMMON_ANDROID_SYNC_COMPOSITOR_MESSAGES_H_
 #define CONTENT_COMMON_ANDROID_SYNC_COMPOSITOR_MESSAGES_H_
 
 namespace content {
 
 struct SyncCompositorCommonBrowserParams {
   SyncCompositorCommonBrowserParams();
   ~SyncCompositorCommonBrowserParams();
 
-  size_t bytes_limit;
+  uint32_t bytes_limit;
   cc::CompositorFrameAck ack;
   gfx::ScrollOffset root_scroll_offset;
   bool update_root_scroll_offset;
   bool begin_frame_source_paused;
 };
 
 struct SyncCompositorDemandDrawHwParams {
   SyncCompositorDemandDrawHwParams();
   SyncCompositorDemandDrawHwParams(
       const gfx::Size& surface_size,
       const gfx::Transform& transform,
       const gfx::Rect& viewport,
       const gfx::Rect& clip,
       const gfx::Rect& viewport_rect_for_tile_priority,
       const gfx::Transform& transform_for_tile_priority);
   ~SyncCompositorDemandDrawHwParams();
 
   gfx::Size surface_size;
   gfx::Transform transform;
   gfx::Rect viewport;
   gfx::Rect clip;
   gfx::Rect viewport_rect_for_tile_priority;
   gfx::Transform transform_for_tile_priority;
 };
 
 struct SyncCompositorSetSharedMemoryParams {
   SyncCompositorSetSharedMemoryParams();
 
-  size_t buffer_size;
+  uint32_t buffer_size;
   base::SharedMemoryHandle shm_handle;
 };
 
 struct SyncCompositorDemandDrawSwParams {
   SyncCompositorDemandDrawSwParams();
   ~SyncCompositorDemandDrawSwParams();
 
   gfx::Size size;
   gfx::Rect clip;
   gfx::Transform transform;
@@ skipping 111 matching lines @@
 
 // -----------------------------------------------------------------------------
 // Messages sent from the renderer to the browser.
 
 IPC_MESSAGE_ROUTED1(SyncCompositorHostMsg_UpdateState,
                     content::SyncCompositorCommonRendererParams)
 
 IPC_MESSAGE_ROUTED2(SyncCompositorHostMsg_OverScroll,
                     content::SyncCompositorCommonRendererParams,
                     content::DidOverscrollParams)