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

cc/output/gl_renderer.cc

 // Copyright 2010 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/gl_renderer.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 #include <string>
@@ skipping 466 matching lines @@
 
   GLC(gl_, gl_->LineWidth(quad->width));
 
   // The indices for the line are stored in the same array as the triangle
   // indices.
   GLC(gl_, gl_->DrawElements(GL_LINE_LOOP, 4, GL_UNSIGNED_SHORT, 0));
 }
 
 static SkBitmap ApplyImageFilter(GLRenderer* renderer,
                                  ContextProvider* offscreen_contexts,
-                                 gfx::Point origin,
+                                 const gfx::Point& origin,
                                  SkImageFilter* filter,
                                  ScopedResource* source_texture_resource) {
   if (!filter)
     return SkBitmap();
 
   if (!offscreen_contexts || !offscreen_contexts->GrContext())
     return SkBitmap();
 
   ResourceProvider::ScopedWriteLockGL lock(renderer->resource_provider(),
                                            source_texture_resource->id());
@@ skipping 2539 matching lines @@
   is_scissor_enabled_ = false;
   GLC(gl_, gl_->Disable(GL_SCISSOR_TEST));
   scissor_rect_needs_reset_ = true;
 }
 
 bool GLRenderer::IsContextLost() {
   return output_surface_->context_provider()->IsContextLost();
 }
 
 }  // namespace cc