Update references to Blink's Platform API headers

content/renderer/gpu/input_handler_proxy.cc

 // Copyright (c) 2013 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 "content/renderer/gpu/input_handler_proxy.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "content/renderer/gpu/input_handler_proxy_client.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/Platform.h"
+#include "third_party/WebKit/public/platform/Platform.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
 
 using WebKit::WebFloatPoint;
 using WebKit::WebFloatSize;
 using WebKit::WebGestureEvent;
 using WebKit::WebInputEvent;
 using WebKit::WebMouseWheelEvent;
 using WebKit::WebPoint;
 using WebKit::WebScrollbar;
 using WebKit::WebTouchEvent;
@@ skipping 382 matching lines @@
   TRACE_EVENT2("renderer",
                "InputHandlerProxy::notifyCurrentFlingVelocity",
                "vx",
                velocity.width,
                "vy",
                velocity.height);
   input_handler_->NotifyCurrentFlingVelocity(ToClientScrollIncrement(velocity));
 }
 
 }  // namespace content