Adding GpuMemoryManager to track GpuCommandBufferStub visibility and last_used_time and dictate mem…

content/common/gpu/gpu_channel.cc

Index: content/common/gpu/gpu_channel.cc
diff --git a/content/common/gpu/gpu_channel.cc b/content/common/gpu/gpu_channel.cc
index ffbbc3c1e6838567360d97fb71855492c88b6d59..3e40af229b151cc634d03390b8d3f851963e306f 100644
--- a/content/common/gpu/gpu_channel.cc
+++ b/content/common/gpu/gpu_channel.cc
@@ -135,6 +135,14 @@ bool GpuChannel::Send(IPC::Message* message) {
   return channel_->Send(message);
 }
 
+void GpuChannel::AppendAllCommandBufferStubs(
+    std::vector<GpuCommandBufferStubBase*>& stubs) {
+  for (StubMap::Iterator<GpuCommandBufferStub> it(&stubs_);
+      !it.IsAtEnd(); it.Advance()) {
+    stubs.push_back(it.GetCurrentValue());
+  }
+}
+
 bool GpuChannel::IsScheduled() {
   for (StubMap::Iterator<GpuCommandBufferStub> it(&stubs_);
        !it.IsAtEnd();