[Master/Overview CL] Make PageScaleFactor work for oopif subframe.

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 <memory>
 
@@ skipping 1340 matching lines @@
     IPC_MESSAGE_HANDLER(ViewMsg_ReleaseDisambiguationPopupBitmap,
                         OnReleaseDisambiguationPopupBitmap)
     IPC_MESSAGE_HANDLER(ViewMsg_ForceRedraw, OnForceRedraw)
     IPC_MESSAGE_HANDLER(ViewMsg_SelectWordAroundCaret, OnSelectWordAroundCaret)
 
     // Page messages.
     IPC_MESSAGE_HANDLER(PageMsg_UpdateWindowScreenRect,
                         OnUpdateWindowScreenRect)
     IPC_MESSAGE_HANDLER(PageMsg_SetZoomLevel, OnSetZoomLevel)
     IPC_MESSAGE_HANDLER(PageMsg_SetDeviceScaleFactor, OnSetDeviceScaleFactor);
+    IPC_MESSAGE_HANDLER(PageMsg_SetPageScaleFactor, OnSetPageScaleFactor);
     IPC_MESSAGE_HANDLER(PageMsg_WasHidden, OnPageWasHidden)
     IPC_MESSAGE_HANDLER(PageMsg_WasShown, OnPageWasShown)
     IPC_MESSAGE_HANDLER(PageMsg_SetHistoryOffsetAndLength,
                         OnSetHistoryOffsetAndLength)
 
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateTopControlsState,
                         OnUpdateTopControlsState)
     IPC_MESSAGE_HANDLER(ViewMsg_ExtractSmartClipData, OnExtractSmartClipData)
 #elif defined(OS_MACOSX)
@@ skipping 1298 matching lines @@
   GetWidget()->FocusChangeComplete();
 }
 
 void RenderViewImpl::OnDeviceScaleFactorChanged() {
   RenderWidget::OnDeviceScaleFactorChanged();
   UpdateWebViewWithDeviceScaleFactor();
   if (auto_resize_mode_)
     AutoResizeCompositor();
 }
 
+void RenderViewImpl::OnSetPageScaleFactor(double page_scale_delta) {
+  static float scale = 1.f;
+  if (webview() && webview()->mainFrame() &&
+      !webview()->mainFrame()->isWebLocalFrame()) {
+    scale = webview()->clampPageScaleFactorToLimits(page_scale_delta * scale);
+    // TODO(wjmaclean): find something better than walking the frame tree to
+    // find the local roots?
+    for (WebFrame* frame = webview()->mainFrame(); frame;
+         frame = frame->traverseNext(false)) {
+      if (frame->isWebLocalFrame() && !frame->parent()->isWebLocalFrame()) {
+        RenderFrameImpl* rfi = RenderFrameImpl::FromWebFrame(frame);
+        RenderWidgetCompositor* widget_compositor =
+            rfi->GetRenderWidget()->compositor();
+        // TODO(wjmaclean): It would likely be better if we could send deltas,
+        // but for now this works.
+        widget_compositor->setPageScaleFactorAndLimits(scale, 1.f, 4.f);
+      }
+    }
+  }
+}
+
 void RenderViewImpl::SetScreenMetricsEmulationParameters(
     bool enabled,
     const blink::WebDeviceEmulationParams& params) {
   if (webview() && compositor()) {
     if (enabled)
       webview()->enableDeviceEmulation(params);
     else
       webview()->disableDeviceEmulation();
   }
 }
@@ skipping 327 matching lines @@
   if (IsUseZoomForDSFEnabled()) {
     webview()->setZoomFactorForDeviceScaleFactor(device_scale_factor_);
   } else {
     webview()->setDeviceScaleFactor(device_scale_factor_);
   }
   webview()->settings()->setPreferCompositingToLCDTextEnabled(
       PreferCompositingToLCDText(compositor_deps_, device_scale_factor_));
 }
 
 }  // namespace content