Remove devtools_instrumentation::kRasterTask in favor of frame viewer's one

cc/debug/frame_viewer_instrumentation.h

 // Copyright 2014 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.
 
 #ifndef CC_DEBUG_FRAME_VIEWER_INSTRUMENTATION_H_
 #define CC_DEBUG_FRAME_VIEWER_INSTRUMENTATION_H_
 
 #include "base/debug/trace_event.h"
 #include "cc/resources/tile.h"
 
 namespace cc {
 namespace frame_viewer_instrumentation {
 namespace internal {
 
-const char kCategory[] = "cc";
+const char kCategory[] = "cc," TRACE_DISABLED_BY_DEFAULT("devtools.timeline");
 const char kTileData[] = "tileData";
 const char kLayerId[] = "layerId";
 const char kTileId[] = "tileId";
 const char kTileResolution[] = "tileResolution";
 const char kSourceFrameNumber[] = "sourceFrameNumber";
 
 const char kAnalyzeTask[] = "AnalyzeTask";
 const char kRasterTask[] = "RasterTask";
 
 scoped_refptr<base::debug::ConvertableToTraceFormat> TileDataAsValue(
@@ skipping 51 matching lines @@
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScopedRasterTask);
 };
 
 }  // namespace frame_viewer_instrumentation
 }  // namespace cc
 
 #endif  // CC_DEBUG_FRAME_VIEWER_INSTRUMENTATION_H_