Pepper Flash Mac: Fix crash when playing video on MB retina

content/browser/renderer_host/render_widget_host_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/timer.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/renderer_host/backing_store.h"
@@ skipping 65 matching lines @@
   virtual bool WaitForBackingStoreMsg(int render_widget_id,
                                       const base::TimeDelta& max_delay,
                                       IPC::Message* msg);
 
   TransportDIB* current_update_buf_;
 
   // Set to true when WaitForBackingStoreMsg should return a successful update
   // message reply. False implies timeout.
   bool update_msg_should_reply_;
 
-  // Indicates the flags that should be sent with a the repaint request. This
+  // Indicates the flags that should be sent with a repaint request. This
   // only has an effect when update_msg_should_reply_ is true.
   int update_msg_reply_flags_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostProcess);
 };
 
 void RenderWidgetHostProcess::InitUpdateRectParams(
     ViewHostMsg_UpdateRect_Params* params) {
   // Create the shared backing store.
   const int w = 100, h = 100;
   const size_t pixel_size = w * h * 4;
 
   if (!current_update_buf_)
     current_update_buf_ = TransportDIB::Create(pixel_size, 0);
   params->bitmap = current_update_buf_->id();
   params->bitmap_rect = gfx::Rect(0, 0, w, h);
   params->dx = 0;
   params->dy = 0;
   params->copy_rects.push_back(params->bitmap_rect);
   params->view_size = gfx::Size(w, h);
   params->flags = update_msg_reply_flags_;
   params->needs_ack = true;
+  params->scale_factor = 1;
 }
 
 bool RenderWidgetHostProcess::WaitForBackingStoreMsg(
     int render_widget_id,
     const base::TimeDelta& max_delay,
     IPC::Message* msg) {
   if (!update_msg_should_reply_)
     return false;
 
   // Construct a fake update reply.
@@ skipping 965 matching lines @@
   SimulateKeyboardEvent(WebInputEvent::RawKeyDown);
   SimulateKeyboardEvent(WebInputEvent::RawKeyDown);
   SendInputEventACK(WebInputEvent::RawKeyDown, true);
 
   // Wait long enough for first timeout and see if it fired.
   MessageLoop::current()->PostDelayedTask(
       FROM_HERE, MessageLoop::QuitClosure(), TimeDelta::FromMilliseconds(40));
   MessageLoop::current()->Run();
   EXPECT_TRUE(host_->unresponsive_timer_fired());
 }
+
+// This test is not valid for Windows because getting the shared memory
+// size doesn't work.
+#if !defined(OS_WIN)
+TEST_F(RenderWidgetHostTest, IncorrectBitmapScaleFactor) {
+  ViewHostMsg_UpdateRect_Params params;
+  process_->InitUpdateRectParams(&params);
+  params.scale_factor = params.scale_factor * 2;
+
+  EXPECT_EQ(0, process_->bad_msg_count());
+  host_->OnMsgUpdateRect(params);
+  EXPECT_EQ(1, process_->bad_msg_count());
+}
+#endif