Introduce SynchronousCompositor + Client

Makes a direct API from aw/browser into the content/renderer
compositor (for use in single process only).
Plumb through the webview SW draw path as first step to removing
the synchronous IPC path.

BUG=230226
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/14445008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@197660 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 35 insertions, 0 deletions

diff --git a/content/public/renderer/android/synchronous_compositor.h b/content/public/renderer/android/synchronous_compositor.h
new file mode 100644
index 0000000..f0c380d
--- /dev/null
+++ b/content/public/renderer/android/synchronous_compositor.h
@@ -0,0 +1,35 @@
+// Copyright (c) 2013 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 CONTENT_PUBLIC_RENDERER_ANDROID_SYNCHRONOUS_COMPOSTIOR_
+#define CONTENT_PUBLIC_RENDERER_ANDROID_SYNCHRONOUS_COMPOSITOR_
+
+class SkCanvas;
+
+namespace content {
+
+class SynchronousCompositorClient;
+
+// Interface for embedders that which to direct compositing operations
+// synchronously under their own control. Only meaningful when the
+// kEnableSyncrhonousRendererCompositor flag is specified.
+class SynchronousCompositor {
+ public:
+  // Allows changing or resetting the client to NULL (this must be used if
+  // the client is being deleted prior to the DidDestroyCompositor() call
+  // being received by the client). Ownership of |client| remains with
+  // the caller.
+  virtual void SetClient(SynchronousCompositorClient* client) = 0;
+
+  // "On demand" SW draw, into the supplied canvas (observing the transform
+  // and clip set there-in).
+  virtual bool DemandDrawSw(SkCanvas* canvas) = 0;
+
+ protected:
+  virtual ~SynchronousCompositor() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_RENDERER_ANDROID_SYNCHRONOUS_COMPOSTIOR_