Rename cc::ResourceProvider::ResourceId to cc::ResourceId and move it to its own file.

cc/output/gl_renderer_unittest.cc

Index: cc/output/gl_renderer_unittest.cc
diff --git a/cc/output/gl_renderer_unittest.cc b/cc/output/gl_renderer_unittest.cc
index 09407f55ed78192066ed9f2d3f993d848b1ac935..31e392c148d40609e62ff6f81d4808448e49ea51 100644
--- a/cc/output/gl_renderer_unittest.cc
+++ b/cc/output/gl_renderer_unittest.cc
@@ -1558,7 +1558,7 @@ TEST_F(GLRendererShaderTest, DrawRenderPassQuadShaderPermutations) {
   RenderPassId root_pass_id(1, 0);
   TestRenderPass* root_pass;
 
-  ResourceProvider::ResourceId mask = resource_provider_->CreateResource(
+  ResourceId mask = resource_provider_->CreateResource(
       gfx::Size(20, 12), GL_CLAMP_TO_EDGE,
       ResourceProvider::TEXTURE_HINT_IMMUTABLE,
       resource_provider_->best_texture_format());
@@ -2169,9 +2169,8 @@ TEST_F(GLRendererTest, DontOverlayWithCopyRequests) {
   mailbox.set_allow_overlay(true);
   scoped_ptr<SingleReleaseCallbackImpl> release_callback =
       SingleReleaseCallbackImpl::Create(base::Bind(&MailboxReleased));
-  ResourceProvider::ResourceId resource_id =
-      resource_provider->CreateResourceFromTextureMailbox(
-          mailbox, release_callback.Pass());
+  ResourceId resource_id = resource_provider->CreateResourceFromTextureMailbox(
+      mailbox, release_callback.Pass());
   bool premultiplied_alpha = false;
   bool flipped = false;
   bool nearest_neighbor = false;
@@ -2296,9 +2295,8 @@ TEST_F(GLRendererTest, OverlaySyncPointsAreProcessed) {
   mailbox.set_allow_overlay(true);
   scoped_ptr<SingleReleaseCallbackImpl> release_callback =
       SingleReleaseCallbackImpl::Create(base::Bind(&MailboxReleased));
-  ResourceProvider::ResourceId resource_id =
-      resource_provider->CreateResourceFromTextureMailbox(
-          mailbox, release_callback.Pass());
+  ResourceId resource_id = resource_provider->CreateResourceFromTextureMailbox(
+      mailbox, release_callback.Pass());
   bool premultiplied_alpha = false;
   bool flipped = false;
   bool nearest_neighbor = false;