gpu: Refactor GpuMemoryBuffer framework for multi-process support.

cc/resources/tile_manager.cc

Index: cc/resources/tile_manager.cc
diff --git a/cc/resources/tile_manager.cc b/cc/resources/tile_manager.cc
index cff5883078b9c86ed91783f0b66222ec8b381c7f..c8d1e80279ef397dc3bd3881734e0000c30bed9f 100644
--- a/cc/resources/tile_manager.cc
+++ b/cc/resources/tile_manager.cc
@@ -130,8 +130,7 @@ scoped_ptr<TileManager> TileManager::Create(
                       PixelBufferRasterWorkerPool::Create(
                           resource_provider, num_raster_threads),
                       num_raster_threads,
-                      rendering_stats_instrumentation,
-                      resource_provider->best_texture_format()));
+                      rendering_stats_instrumentation));
 }
 
 TileManager::TileManager(
@@ -139,8 +138,7 @@ TileManager::TileManager(
     ResourceProvider* resource_provider,
     scoped_ptr<RasterWorkerPool> raster_worker_pool,
     size_t num_raster_threads,
-    RenderingStatsInstrumentation* rendering_stats_instrumentation,
-    GLenum texture_format)
+    RenderingStatsInstrumentation* rendering_stats_instrumentation)
     : client_(client),
       resource_pool_(ResourcePool::Create(resource_provider)),
       raster_worker_pool_(raster_worker_pool.Pass()),
@@ -151,8 +149,7 @@ TileManager::TileManager(
       resources_releasable_(0),
       ever_exceeded_memory_budget_(false),
       rendering_stats_instrumentation_(rendering_stats_instrumentation),
-      did_initialize_visible_tile_(false),
-      texture_format_(texture_format) {
+      did_initialize_visible_tile_(false) {
   raster_worker_pool_->SetClient(this);
 }
 
@@ -732,8 +729,9 @@ RasterWorkerPool::RasterTask TileManager::CreateRasterTask(Tile* tile) {
   ManagedTileState& mts = tile->managed_state();
 
   scoped_ptr<ResourcePool::Resource> resource =
-      resource_pool_->AcquireResource(tile->tile_size_.size(),
-                                      texture_format_);
+      resource_pool_->AcquireResource(
+          tile->tile_size_.size(),
+          raster_worker_pool_->GetResourceFormat());
   const Resource* const_resource = resource.get();
 
   // Create and queue all image decode tasks that this tile depends on.