Remove parts of //cc we aren't using

cc/output/output_surface.cc

Index: cc/output/output_surface.cc
diff --git a/cc/output/output_surface.cc b/cc/output/output_surface.cc
index b1a2b9a4647121746fcd342a22d5f2be7d9cd24c..630019e61ecbb58f0ec0ca378cca740bb906417e 100644
--- a/cc/output/output_surface.cc
+++ b/cc/output/output_surface.cc
@@ -7,7 +7,6 @@
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/trace_event/trace_event.h"
-#include "cc/output/managed_memory_policy.h"
 #include "cc/output/output_surface_client.h"
 #include "gpu/GLES2/gl2extchromium.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
@@ -179,9 +178,6 @@ void OutputSurface::SetUpContext3d() {
   context_provider_->SetLostContextCallback(
       base::Bind(&OutputSurface::DidLoseOutputSurface,
                  base::Unretained(this)));
-  context_provider_->SetMemoryPolicyChangedCallback(
-      base::Bind(&OutputSurface::SetMemoryPolicy,
-                 base::Unretained(this)));
 }
 
 void OutputSurface::ReleaseContextProvider() {
@@ -194,8 +190,6 @@ void OutputSurface::ResetContext3d() {
   if (context_provider_.get()) {
     context_provider_->SetLostContextCallback(
         ContextProvider::LostContextCallback());
-    context_provider_->SetMemoryPolicyChangedCallback(
-        ContextProvider::MemoryPolicyChangedCallback());
   }
   if (worker_context_provider_.get()) {
     worker_context_provider_->SetLostContextCallback(
@@ -253,14 +247,4 @@ void OutputSurface::OnSwapBuffersComplete() {
   client_->DidSwapBuffersComplete();
 }
 
-void OutputSurface::SetMemoryPolicy(const ManagedMemoryPolicy& policy) {
-  TRACE_EVENT1("cc", "OutputSurface::SetMemoryPolicy",
-               "bytes_limit_when_visible", policy.bytes_limit_when_visible);
-  // Just ignore the memory manager when it says to set the limit to zero
-  // bytes. This will happen when the memory manager thinks that the renderer
-  // is not visible (which the renderer knows better).
-  if (policy.bytes_limit_when_visible)
-    client_->SetMemoryPolicy(policy);
-}
-
 }  // namespace cc