Global GPU memory manager for android webview

android_webview/browser/shared_renderer_state.h

Index: android_webview/browser/shared_renderer_state.h
diff --git a/android_webview/browser/shared_renderer_state.h b/android_webview/browser/shared_renderer_state.h
index a7ec60ca55163dce2059113c70a1d1b37e5297e6..febba24dc308501d55a6b5e321f6e4b70fb79824 100644
--- a/android_webview/browser/shared_renderer_state.h
+++ b/android_webview/browser/shared_renderer_state.h
@@ -51,6 +51,12 @@ class SharedRendererState {
 
   // This function can be called on both UI and RT thread.
   content::SynchronousCompositor* GetCompositor();
+
+  void SetMemoryPolicy(const content::SynchronousCompositorMemoryPolicy policy);
+  content::SynchronousCompositorMemoryPolicy GetMemoryPolicy() const;
+
+  void SetMemoryPolicyDirty(bool is_dirty);
+  bool IsMemoryPolicyDirty() const;
   void SetDrawGLInput(const DrawGLInput& input);
   DrawGLInput GetDrawGLInput() const;
 
@@ -65,6 +71,10 @@ class SharedRendererState {
 
   // Accessed by both UI and RT thread.
   content::SynchronousCompositor* compositor_;
+  content::SynchronousCompositorMemoryPolicy memory_policy_;
+  // Set to true when SetMemoryPolicy called with a different memory policy.
+  // Set to false when memory policy is read and enforced to compositor.
+  bool memory_policy_dirty_;
   DrawGLInput draw_gl_input_;
 };