Revert of [#7] Pass gfx structs by const ref (gfx::Size)

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index 8b9453fc1b55bbd9145f8cdf6ccec734e72b30fb..b43164847a0ad7ac62db9c801c499cd1448d7745 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -197,7 +197,7 @@
 ResourceProvider::Resource::~Resource() {}
 
 ResourceProvider::Resource::Resource(GLuint texture_id,
-                                     const gfx::Size& size,
+                                     gfx::Size size,
                                      GLenum target,
                                      GLenum filter,
                                      GLenum texture_pool,
@@ -240,7 +240,7 @@
 
 ResourceProvider::Resource::Resource(uint8_t* pixels,
                                      SharedBitmap* bitmap,
-                                     const gfx::Size& size,
+                                     gfx::Size size,
                                      GLenum filter,
                                      GLint wrap_mode)
     : child_id(0),
@@ -330,7 +330,7 @@
 }
 
 ResourceProvider::ResourceId ResourceProvider::CreateResource(
-    const gfx::Size& size,
+    gfx::Size size,
     GLint wrap_mode,
     TextureUsageHint hint,
     ResourceFormat format) {
@@ -355,7 +355,7 @@
 }
 
 ResourceProvider::ResourceId ResourceProvider::CreateManagedResource(
-    const gfx::Size& size,
+    gfx::Size size,
     GLenum target,
     GLint wrap_mode,
     TextureUsageHint hint,
@@ -381,7 +381,7 @@
 }
 
 ResourceProvider::ResourceId ResourceProvider::CreateGLTexture(
-    const gfx::Size& size,
+    gfx::Size size,
     GLenum target,
     GLenum texture_pool,
     GLint wrap_mode,
@@ -400,7 +400,7 @@
 }
 
 ResourceProvider::ResourceId ResourceProvider::CreateBitmap(
-    const gfx::Size& size, GLint wrap_mode) {
+    gfx::Size size, GLint wrap_mode) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   scoped_ptr<SharedBitmap> bitmap;