Change panel drag related methods to use mouse location in screen coordinates.

chrome/browser/ui/panels/panel_titlebar_view_cocoa.h

Index: chrome/browser/ui/panels/panel_titlebar_view_cocoa.h
diff --git a/chrome/browser/ui/panels/panel_titlebar_view_cocoa.h b/chrome/browser/ui/panels/panel_titlebar_view_cocoa.h
index a93f5b8c231dafb9873a7abb7aa52ff1df10c69f..4c741e43bec10b99906f8fec0ac27e837e610748 100644
--- a/chrome/browser/ui/panels/panel_titlebar_view_cocoa.h
+++ b/chrome/browser/ui/panels/panel_titlebar_view_cocoa.h
@@ -58,7 +58,7 @@ enum PanelDragState {
   ScopedCrTrackingArea closeButtonTrackingArea_;
   PanelDragState dragState_;
   BOOL isDrawingAttention_;
-  NSPoint dragStartLocation_;
+  NSPoint dragStartLocation_;  // in screen coordinates.
   // "Glint" animation is used in "Draw Attention" mode.
   scoped_nsobject<RepaintAnimation> glintAnimation_;
   scoped_nsobject<NSTimer> glintAnimationTimer_;
@@ -89,10 +89,10 @@ enum PanelDragState {
 - (void)didChangeMainWindow:(NSNotification*)notification;
 
 // Helpers to control title drag operation, called from more then one place.
-- (void)startDrag;
+// |mouseLocation| is in screen coordinates.
+- (void)startDrag:(NSPoint)mouseLocation;
 - (void)endDrag:(BOOL)cancelled;
-- (void)dragWithDeltaX:(int)deltaX
-                deltaY:(int)deltaY;
+- (void)drag:(NSPoint)mouseLocation;
 
   // Update the visibility of settings button.
 - (void)updateSettingsButtonVisibility:(BOOL)mouseOverWindow;
@@ -122,10 +122,9 @@ enum PanelDragState {
 - (void)simulateCloseButtonClick;
 
 // NativePanelTesting support.
-- (void)pressLeftMouseButtonTitlebar;
+- (void)pressLeftMouseButtonTitlebar:(NSPoint)mouseLocation;

[jennb, 2012/03/07 00:17:46]

Are these using screen coordinates? NativePanel say these are in screen
coordinates. PanelBrowserWindowCocoa converts these to Cocoa Coordinates before
calling these methods. The .mm file for this class convertsFromScreenToBase on
these coordinates in pressLeftMouseButtonTitlebar but uses them directly as
screen coordinates in dragTitlebar.

[jianli, 2012/03/07 00:46:49]

Per discussion, added comment.

 - (void)releaseLeftMouseButtonTitlebar;
-- (void)dragTitlebarDeltaX:(double)delta_x
-                    deltaY:(double)delta_y;
+- (void)dragTitlebar:(NSPoint)mouseLocation;
 - (void)cancelDragTitlebar;
 - (void)finishDragTitlebar;