Global GPU memory manager for android webview

android_webview/browser/hardware_renderer.h

Index: android_webview/browser/hardware_renderer.h
diff --git a/android_webview/browser/hardware_renderer.h b/android_webview/browser/hardware_renderer.h
index 4f226d2890896b9e0ed32c477935a3efa89b2c6e..24260c6dc13c2aca9c2cd48a0a8e42a72043bac3 100644
--- a/android_webview/browser/hardware_renderer.h
+++ b/android_webview/browser/hardware_renderer.h
@@ -8,6 +8,7 @@
 #include <queue>
 
 #include "android_webview/browser/gl_view_renderer_manager.h"
+#include "android_webview/browser/global_tile_manager.h"
 #include "android_webview/browser/shared_renderer_state.h"
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/android/synchronous_compositor.h"
@@ -33,11 +34,16 @@ class HardwareRenderer {
   bool DrawGL(AwDrawGLInfo* draw_info, DrawGLResult* result);
   bool TrimMemory(int level, bool visible);
 
+  size_t ForceDropTiles();
+
+  // If the hardware renderer gets hungry for more than kStarvedTimes in a row,
+  // it becomes starved.
+  bool IsStarved();
+
  private:
   friend class internal::DeferredGpuCommandService;
 
   void SetMemoryPolicy(content::SynchronousCompositorMemoryPolicy& new_policy);
-
   SharedRendererState* shared_renderer_state_;
 
   typedef void* EGLContext;
@@ -46,7 +52,12 @@ class HardwareRenderer {
   scoped_refptr<AwGLSurface> gl_surface_;
   content::SynchronousCompositorMemoryPolicy memory_policy_;
 
-  GLViewRendererManager::Key manager_key_;
+  GLViewRendererManager::Key renderer_manager_key_;
+  GlobalTileManager::Key tile_manager_key_;
+
+  // Number of times the hardware renderer gets the tile allocation less than
+  // kGrallocHungryLimit
+  size_t num_hungry_;
 
   DISALLOW_COPY_AND_ASSIGN(HardwareRenderer);
 };