Combine ViewHostMsg_{Paint,Scroll}Rect into one IPC.

The combined IPC means that scrolling only requires one transport DIB instead
of two.  Previously, we'd use one in the ScrollRect IPC to pass up the pixels
for the exposed region, and then we'd use a second one in the PaintRect IPC to
pass up the pixels for the updated scroll bar rendering.  Now all paints are
done using a single transport DIB.

Optimize RenderWidgetHostViewWin::OnPaint to only paint the damaged regions.
This means calling GetUpdateRgn and GetRegionData to enumerate the list of
damage rects.  Then only those rects are copied from the backing store.

The same optimization is not done for Linux or Mac yet.

R=brettw
BUG=29591
TEST=none

Review URL: http://codereview.chromium.org/506013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@34951 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 2 insertions, 2 deletions

diff --git a/chrome/browser/renderer_host/render_widget_host_view_mac.h b/chrome/browser/renderer_host/render_widget_host_view_mac.h
index c661578..3dc07b2 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_mac.h
+++ b/chrome/browser/renderer_host/render_widget_host_view_mac.h
@@ -95,8 +95,8 @@ class RenderWidgetHostViewMac : public RenderWidgetHostView {
   virtual void UpdateCursor(const WebCursor& cursor);
   virtual void SetIsLoading(bool is_loading);
   virtual void IMEUpdateStatus(int control, const gfx::Rect& caret_rect);
-  virtual void DidPaintRect(const gfx::Rect& rect);
-  virtual void DidScrollRect(const gfx::Rect& rect, int dx, int dy);
+  virtual void DidPaintBackingStoreRects(const std::vector<gfx::Rect>& rects);
+  virtual void DidScrollBackingStoreRect(const gfx::Rect& rect, int dx, int dy);
   virtual void RenderViewGone();
   virtual void WillDestroyRenderWidget(RenderWidgetHost* rwh) {};
   virtual void Destroy();