Drop frontbuffers with ui-use-gpu-process, synchronized with browser, decoupled from backbuffer dro…

content/common/gpu/image_transport_surface_linux.cc

Index: content/common/gpu/image_transport_surface_linux.cc
diff --git a/content/common/gpu/image_transport_surface_linux.cc b/content/common/gpu/image_transport_surface_linux.cc
index 0f9984f4867f48e427882e5efe8b5c13ca3eff1d..90a0881f3f1184856704144e5c19e368b418ae68 100644
--- a/content/common/gpu/image_transport_surface_linux.cc
+++ b/content/common/gpu/image_transport_surface_linux.cc
@@ -103,6 +103,7 @@ class EGLImageTransportSurface
   virtual void OnBuffersSwappedACK() OVERRIDE;
   virtual void OnPostSubBufferACK() OVERRIDE;
   virtual void OnResizeViewACK() OVERRIDE;
+  virtual void OnSetFrontSurfaceIsProtected(bool is_protected) OVERRIDE;
   virtual void OnResize(gfx::Size size) OVERRIDE;
 
  private:
@@ -160,6 +161,7 @@ class GLXImageTransportSurface
   virtual void OnBuffersSwappedACK() OVERRIDE;
   virtual void OnPostSubBufferACK() OVERRIDE;
   virtual void OnResizeViewACK() OVERRIDE;
+  virtual void OnSetFrontSurfaceIsProtected(bool is_protected) OVERRIDE;
   virtual void OnResize(gfx::Size size) OVERRIDE;
 
  private:
@@ -219,6 +221,7 @@ class OSMesaImageTransportSurface : public ImageTransportSurface,
   virtual void OnBuffersSwappedACK() OVERRIDE;
   virtual void OnPostSubBufferACK() OVERRIDE;
   virtual void OnResizeViewACK() OVERRIDE;
+  virtual void OnSetFrontSurfaceIsProtected(bool is_protected) OVERRIDE;
   virtual void OnResize(gfx::Size size) OVERRIDE;
 
  private:
@@ -519,6 +522,10 @@ void EGLImageTransportSurface::OnNewSurfaceACK(
   helper_->SetScheduled(true);
 }
 
+void EGLImageTransportSurface::OnSetFrontSurfaceIsProtected(
+    bool is_protected) {
+}
+
 void EGLImageTransportSurface::OnBuffersSwappedACK() {
   helper_->SetScheduled(true);
 }
@@ -760,6 +767,10 @@ void GLXImageTransportSurface::OnNewSurfaceACK(
     uint64 surface_handle, TransportDIB::Handle /*shm_handle*/) {
 }
 
+void GLXImageTransportSurface::OnSetFrontSurfaceIsProtected(
+    bool is_protected) {
+}
+
 void GLXImageTransportSurface::OnBuffersSwappedACK() {
   helper_->SetScheduled(true);
 }
@@ -846,6 +857,10 @@ void OSMesaImageTransportSurface::OnNewSurfaceACK(
   helper_->SetScheduled(true);
 }
 
+void OSMesaImageTransportSurface::OnSetFrontSurfaceIsProtected(
+    bool is_protected) {
+}
+
 void OSMesaImageTransportSurface::OnResizeViewACK() {
   NOTREACHED();
 }