Update references to Blink's Platform API headers

cc/output/shader.cc

 // Copyright 2011 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/output/shader.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "cc/output/gl_renderer.h"  // For the GLC() macro.
-#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
+#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
 #include "third_party/khronos/GLES2/gl2.h"
 
 #define SHADER0(Src) #Src
 #define VERTEX_SHADER(Src) SetVertexTexCoordPrecision(SHADER0(Src))
 #define FRAGMENT_SHADER(Src) SetFragTexCoordPrecision(precision, SHADER0(Src))
 
 using WebKit::WebGraphicsContext3D;
 
 namespace cc {
 
@@ skipping 1470 matching lines @@
       vec2 texCoord =
           clamp(v_texCoord, 0.0, 1.0) * texTransform.zw + texTransform.xy;
       vec2 coord = mod(floor(texCoord * frequency * 2.0), 2.0);
       float picker = abs(coord.x - coord.y);
       gl_FragColor = mix(color1, color2, picker) * alpha;
     }
   );  // NOLINT(whitespace/parens)
 }
 
 }  // namespace cc