Don't leak CopyResult textures.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index 8fbaad82ee016e1739ea068b586ac9b7a0ab1629..463492a2c9dcbfcf784a89be5a54fe8d338a5185 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -1719,10 +1719,12 @@ void RenderWidgetHostViewAura::CopyFromCompositingSurfaceHasResult(
 
 static void CopyFromCompositingSurfaceFinished(
     const base::Callback<void(bool, const SkBitmap&)>& callback,
+    const cc::TextureMailbox::ReleaseCallback& release_callback,
     scoped_ptr<SkBitmap> bitmap,
     scoped_ptr<SkAutoLockPixels> bitmap_pixels_lock,
     bool result) {
   bitmap_pixels_lock.reset();
+  release_callback.Run(0, false);
   callback.Run(result, *bitmap);
 }
 
@@ -1770,6 +1772,7 @@ void RenderWidgetHostViewAura::PrepareTextureCopyOutputResult(
       pixels,
       base::Bind(&CopyFromCompositingSurfaceFinished,
                  callback,
+                 texture_mailbox->callback(),
                  base::Passed(&bitmap),
                  base::Passed(&bitmap_pixels_lock)));
 }
@@ -1801,6 +1804,14 @@ void RenderWidgetHostViewAura::PrepareBitmapCopyOutputResult(
   callback.Run(true, bitmap);
 }
 
+static void CopyFromCompositingSurfaceFinishedForVideo(
+    const base::Callback<void(bool)>& callback,
+    const cc::TextureMailbox::ReleaseCallback& release_callback,
+    bool result) {
+  release_callback.Run(0, false);
+  callback.Run(result);
+}
+
 // static
 void RenderWidgetHostViewAura::CopyFromCompositingSurfaceHasResultForVideo(
     base::WeakPtr<RenderWidgetHostViewAura> rwhva,
@@ -1884,11 +1895,15 @@ void RenderWidgetHostViewAura::CopyFromCompositingSurfaceHasResultForVideo(
   }
 
   scoped_callback_runner.Release();
+  base::Callback<void(bool result)> finished_callback = base::Bind(
+      &CopyFromCompositingSurfaceFinishedForVideo,
+      callback,
+      texture_mailbox->callback());
   yuv_readback_pipeline->ReadbackYUV(
       texture_mailbox->name(),
       texture_mailbox->sync_point(),
       video_frame.get(),
-      callback);
+      finished_callback);
 }
 
 void RenderWidgetHostViewAura::GetScreenInfo(WebScreenInfo* results) {