[#8] Pass gfx::Point by const ref.

cc/output/shader.h

 // 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.
 
 #ifndef CC_OUTPUT_SHADER_H_
 #define CC_OUTPUT_SHADER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 25 matching lines @@
   SamplerType2D = 1,
   SamplerType2DRect = 2,
   SamplerTypeExternalOES = 3,
   NumSamplerTypes = 4
 };
 
 // Note: The highp_threshold_cache must be provided by the caller to make
 // the caching multi-thread/context safe in an easy low-overhead manner.
 // The caller must make sure to clear highp_threshold_cache to 0, so it can be
 // reinitialized, if a new or different context is used.
-CC_EXPORT TexCoordPrecision TexCoordPrecisionRequired(
-    gpu::gles2::GLES2Interface* context,
-    int *highp_threshold_cache,
-    int highp_threshold_min,
-    gfx::Point max_coordinate);
+CC_EXPORT TexCoordPrecision
+    TexCoordPrecisionRequired(gpu::gles2::GLES2Interface* context,
+                              int* highp_threshold_cache,
+                              int highp_threshold_min,
+                              const gfx::Point& max_coordinate);
 
 CC_EXPORT TexCoordPrecision TexCoordPrecisionRequired(
     gpu::gles2::GLES2Interface* context,
     int *highp_threshold_cache,
     int highp_threshold_min,
     const gfx::Size& max_size);
 
 class VertexShaderPosTex {
  public:
   VertexShaderPosTex();
@@ skipping 663 matching lines @@
   int tex_transform_location_;
   int frequency_location_;
   int color_location_;
 
   DISALLOW_COPY_AND_ASSIGN(FragmentShaderCheckerboard);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_SHADER_H_