[#7] Pass gfx::Size by const ref.

Any struct of size > 4 bytes should be passed by const ref. 
Passing by ref for these structs is faster than passing by value,
especially when invoking function has multiple parameters and some
other scenarios mentioned in the bug.

BUG=159273

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=247426

Review URL: https://codereview.chromium.org/145313006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247769 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 2 insertions, 2 deletions

diff --git a/cc/output/copy_output_result.h b/cc/output/copy_output_result.h
index c2f011d..b4806581 100644
--- a/cc/output/copy_output_result.h
+++ b/cc/output/copy_output_result.h
@@ -26,7 +26,7 @@ class CC_EXPORT CopyOutputResult {
     return make_scoped_ptr(new CopyOutputResult(bitmap.Pass()));
   }
   static scoped_ptr<CopyOutputResult> CreateTextureResult(
-      gfx::Size size,
+      const gfx::Size& size,
       const TextureMailbox& texture_mailbox,
       scoped_ptr<SingleReleaseCallback> release_callback) {
     return make_scoped_ptr(
@@ -47,7 +47,7 @@ class CC_EXPORT CopyOutputResult {
  private:
   CopyOutputResult();
   explicit CopyOutputResult(scoped_ptr<SkBitmap> bitmap);
-  explicit CopyOutputResult(gfx::Size size,
+  explicit CopyOutputResult(const gfx::Size& size,
                             const TextureMailbox& texture_mailbox,
                             scoped_ptr<SingleReleaseCallback> release_callback);