mac: Make dynamic DPI changes work.

content/renderer/render_view_impl.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 "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <vector>
@@ skipping 5286 matching lines @@
         WebRange webrange = WebRange::fromDocumentRange(
             frame, replacement_range.start(), replacement_range.length());
         if (!webrange.isNull())
           frame->setSelectionToRange(webrange);
       }
     }
     RenderWidget::OnImeConfirmComposition(text, replacement_range);
   }
 }
 
+void RenderViewImpl::OnSetDeviceScaleFactor(float device_scale_factor) {
+  RenderWidget::OnSetDeviceScaleFactor(device_scale_factor);
+  if (webview())
+    webview()->setDeviceScaleFactor(device_scale_factor);
+}
+
 ui::TextInputType RenderViewImpl::GetTextInputType() {
   return pepper_delegate_.IsPluginFocused() ?
       pepper_delegate_.GetTextInputType() : RenderWidget::GetTextInputType();
 }
 
 void RenderViewImpl::GetSelectionBounds(gfx::Rect* start, gfx::Rect* end) {
   if (pepper_delegate_.IsPluginFocused()) {
     // TODO(kinaba) http://crbug.com/101101
     // Current Pepper IME API does not handle selection bounds. So we simply
     // use the caret position as an empty range for now. It will be updated
@@ skipping 310 matching lines @@
 bool RenderViewImpl::WebWidgetHandlesCompositorScheduling() const {
   return !!RenderThreadImpl::current()->compositor_thread();
 }
 
 void RenderViewImpl::OnJavaBridgeInit() {
   DCHECK(!java_bridge_dispatcher_);
 #if defined(ENABLE_JAVA_BRIDGE)
   java_bridge_dispatcher_ = new JavaBridgeDispatcher(this);
 #endif
 }