Subrect snapshot support.

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index 676e3862d35749f71a8ba81e8c6cd74b8b055d62..6e9135af82a18422854d44bb6ed8af348aee5f7e 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -552,7 +552,17 @@ unsigned int ContentViewCoreImpl::GetScaledContentTexture(
   if (!view)
     return 0;
 
-  return view->GetScaledContentTexture(size);
+  return GetScaledContentTexture(size, GetBounds());

[no sievers, 2012/12/17 21:20:02]

Using GetBounds() here is racy during resizing, because this returns the size of
the view while the texture might have a different size.
I guess you have the same problem with passing in a source rect below, so it
would be better to always scale the whole thing and later copy out your subrect.
What's this used for?

+}
+
+unsigned int ContentViewCoreImpl::GetScaledContentTexture(
+      const gfx::Size& size,
+      const gfx::Rect& src_rect) {
+  RenderWidgetHostViewAndroid* view = GetRenderWidgetHostViewAndroid();
+  if (!view)
+    return 0;
+
+  return view->GetScaledContentTexture(size, src_rect);
 }
 
 void ContentViewCoreImpl::StartContentIntent(const GURL& content_url) {