Remove ShallowFlushCHROMIUM after resource deletion

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 806 matching lines @@
       resource->pixels = nullptr;
     }
     resource->release_callback_impl.Run(sync_token, lost_resource,
                                         blocking_main_thread_task_runner_);
   }
   if (resource->gl_id) {
     GLES2Interface* gl = ContextGL();
     DCHECK(gl);
     gl->DeleteTextures(1, &resource->gl_id);
     resource->gl_id = 0;
-    // Shallow flush after deleting a texture to make sure the memory is freed
-    // as soon as possible.
-    gl->ShallowFlushCHROMIUM();
   }
   if (resource->shared_bitmap) {
     DCHECK(resource->origin != Resource::EXTERNAL);
     DCHECK_EQ(RESOURCE_TYPE_BITMAP, resource->type);
     delete resource->shared_bitmap;
     resource->pixels = nullptr;
   }
   if (resource->pixels) {
     DCHECK(resource->origin == Resource::INTERNAL);
     delete[] resource->pixels;
@@ skipping 1309 matching lines @@
 
     const int kImportance = 2;
     pmd->CreateSharedGlobalAllocatorDump(guid);
     pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
   }
 
   return true;
 }
 
 }  // namespace cc