Global GPU memory manager for android webview

android_webview/browser/hardware_renderer.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_H_
 #define ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_H_
 
 #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"
 
 struct AwDrawGLInfo;
 
 namespace android_webview {
 
 class AwGLSurface;
 class BrowserViewRendererClient;
 
 namespace internal {
 class DeferredGpuCommandService;
 }  // namespace internal
 
 class HardwareRenderer {
  public:
   explicit HardwareRenderer(SharedRendererState* state);
   ~HardwareRenderer();
 
   static void CalculateTileMemoryPolicy();
 
   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;
   EGLContext last_egl_context_;
 
   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);
 };
 
 namespace internal {
 
 class ScopedAllowGL {
  public:
   ScopedAllowGL();
   ~ScopedAllowGL();
@@ skipping 36 matching lines @@
 
   scoped_refptr<gpu::gles2::ShaderTranslatorCache> shader_translator_cache_;
   DISALLOW_COPY_AND_ASSIGN(DeferredGpuCommandService);
 };
 
 }  // namespace internal
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_H_