Add a new resizer corner.

To display a resize bitmap and handle the mouse interactions as requested in
http://code.google.com/p/chromium/issues/detail?id=458.
BUG=458

There are unfortunately two cases to handle and they must be handled separately.
The first one is when there are no bottom shelf like the download bar,
and the case where there is one.

For the case without, we must draw on top of what we receive from WebKit,
so we intercept the bitmap in RenderWidgetHostViewWin::OnPaint() so that we
can draw the resize corner bitmap on top of it (taking into account whether
we are in a right to left language or not).

For the case where we have a bottom shelf, we use a dedicated view that we
properly layout on top of the bottom shelf view (which takes care of handling
the RTL language case for us).

Same split for the mouse interactions. Without the bottom shelf, we must deal
with it in RenderWidgetHostViewWin::OnMouseEvent() by sending the root window
a WM_NCLBUTTONDOWN message with either HTBOTTOMRIGHT or HTBOTTOMLEFT (based on
the RTL setting) and let the OS take care of the resizing. IF we have a bottom
shelf, we must deal with the mouse interaction in
BrowserView::NonClientHitTest()
to either return HTBOTTOMRIGHT or HTBOTTOMLEFT (again, based on the RTL setting)
and, again, let the OS take care of the resizing.

More details here:
http://code.google.com/p/chromium/wiki/BrowserViewResizer


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@9408 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 5 insertions, 3 deletions

diff --git a/chrome/common/render_messages_internal.h b/chrome/common/render_messages_internal.h
index e6b401e..d51af0e 100644
--- a/chrome/common/render_messages_internal.h
+++ b/chrome/common/render_messages_internal.h
@@ -70,9 +70,11 @@ IPC_BEGIN_MESSAGES(View)
   // Tells the render view to change its size.  A ViewHostMsg_PaintRect message
   // is generated in response provided new_size is not empty and not equal to
   // the view's current size.  The generated ViewHostMsg_PaintRect message will
-  // have the IS_RESIZE_ACK flag set.
-  IPC_MESSAGE_ROUTED1(ViewMsg_Resize,
-                      gfx::Size /* new_size */)
+  // have the IS_RESIZE_ACK flag set. It also receives the resizer rect so that
+  // we don't have to fetch it every time WebKit asks for it.
+  IPC_MESSAGE_ROUTED2(ViewMsg_Resize,
+                      gfx::Size /* new_size */,
+                      gfx::Rect /* resizer_rect */)
 
   // Sent to inform the view that it was hidden.  This allows it to reduce its
   // resource utilization.