[MacViews] Enable dragging a window by its caption/draggable areas.

ui/views/cocoa/bridged_content_view.mm

 // Copyright 2014 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.
 
 #import "ui/views/cocoa/bridged_content_view.h"
 
 #include "base/logging.h"
 #import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ui/base/ime/text_input_client.h"
@@ skipping 79 matching lines @@
 - (void)copy:(id)sender;
 - (void)paste:(id)sender;
 - (void)selectAll:(id)sender;
 
 @end
 
 @implementation BridgedContentView
 
 @synthesize hostedView = hostedView_;
 @synthesize textInputClient = textInputClient_;
+@synthesize mouseDownCanMoveWindow = mouseDownCanMoveWindow_;
 
 - (id)initWithView:(views::View*)viewToHost {
   DCHECK(viewToHost);
   gfx::Rect bounds = viewToHost->bounds();
   // To keep things simple, assume the origin is (0, 0) until there exists a use
   // case for something other than that.
   DCHECK(bounds.origin().IsOrigin());
   NSRect initialFrame = NSMakeRect(0, 0, bounds.width(), bounds.height());
   if ((self = [super initWithFrame:initialFrame])) {
     hostedView_ = viewToHost;
@@ skipping 611 matching lines @@
   }
 
   return [super accessibilityAttributeValue:attribute];
 }
 
 - (id)accessibilityHitTest:(NSPoint)point {
   return [hostedView_->GetNativeViewAccessible() accessibilityHitTest:point];
 }
 
 @end