CrOS: Set max frames pending for UI from command line.

cc/output_surface.h

 // 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.
 
 #ifndef CC_OUTPUT_SURFACE_H_
 #define CC_OUTPUT_SURFACE_H_
 
 #define USE_CC_OUTPUT_SURFACE // TODO(danakj): Remove this.
 
 #include "base/basictypes.h"
@@ skipping 26 matching lines @@
 
   OutputSurface(scoped_ptr<cc::SoftwareOutputDevice> software_device);
 
   OutputSurface(scoped_ptr<WebKit::WebGraphicsContext3D> context3d,
                 scoped_ptr<cc::SoftwareOutputDevice> software_device);
 
   virtual ~OutputSurface();
 
   struct Capabilities {
     Capabilities()
-        : has_parent_compositor(false) {}
+        : has_parent_compositor(false),
+          max_frames_pending(0) {}
 
     bool has_parent_compositor;
+    int max_frames_pending;
   };
 
   const Capabilities& capabilities() const {
     return capabilities_;
   }
 
   // Obtain the 3d context or the software device associated with this output
   // surface. Either of these may return a null pointer, but not both.
   // In the event of a lost context, the entire output surface should be
   // recreated.
@@ skipping 37 matching lines @@
   scoped_ptr<cc::SoftwareOutputDevice> software_device_;
   bool has_gl_discard_backbuffer_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(OutputSurface);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_SURFACE_H_