MacViews: Add WidgetEventGenerator to abstract platform-specific event generation for tests.

ui/views/cocoa/bridged_content_view.mm

Index: ui/views/cocoa/bridged_content_view.mm
diff --git a/ui/views/cocoa/bridged_content_view.mm b/ui/views/cocoa/bridged_content_view.mm
index bd9a511a24468e0b4901e9f184bcb5e6217e8919..de2d12ea7d10a7d0e8335abe0a1326853ada4de6 100644
--- a/ui/views/cocoa/bridged_content_view.mm
+++ b/ui/views/cocoa/bridged_content_view.mm
@@ -7,6 +7,15 @@
 #include "base/logging.h"
 #include "ui/gfx/canvas_paint_mac.h"
 #include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
+@interface BridgedContentView ()
+
+// Translates the location of |theEvent| to toolkit-views coordinates and passes
+// the event to NativeWidgetMac for handling.
+- (void)handleMouseEvent:(NSEvent*)theEvent;
+
+@end
 
 @implementation BridgedContentView
 
@@ -29,8 +38,22 @@
   hostedView_ = NULL;
 }
 
+// BridgedContentView private implementation.
+
+- (void)handleMouseEvent:(NSEvent*)theEvent {
+  if (!hostedView_)
+    return;
+
+  ui::MouseEvent event(theEvent);
+  hostedView_->GetWidget()->OnMouseEvent(&event);
+}
+
 // NSView implementation.
 
+- (BOOL)acceptsFirstResponder {
+  return YES;
+}
+
 - (void)setFrameSize:(NSSize)newSize {
   [super setFrameSize:newSize];
   if (!hostedView_)
@@ -47,4 +70,53 @@
   hostedView_->Paint(&canvas, views::CullSet());
 }
 
+- (void)mouseDown:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)rightMouseDown:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)otherMouseDown:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)mouseUp:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)rightMouseUp:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)otherMouseUp:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)mouseDragged:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)rightMouseDragged:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)otherMouseDragged:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)mouseMoved:(NSEvent*)theEvent {
+  // Note: mouseEntered: and mouseExited: are not handled separately.
+  // |hostedView_| is responsible for converting the move events into entered
+  // and exited events for the view heirarchy.
+  // TODO(tapted): Install/uninstall tracking areas when required so that the
+  // NSView will receive these events outside of tests.
+  [self handleMouseEvent:theEvent];
+}
+
+- (void)scrollWheel:(NSEvent*)theEvent {
+  [self handleMouseEvent:theEvent];
+}
+
 @end