DoubleTap Zoom support for Mobile Viewport pages

content/browser/renderer_host/render_widget_host_view_android.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/browser/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include <utility>
 
@@ skipping 1189 matching lines @@
 }
 
 void RenderWidgetHostViewAndroid::ClearCompositorFrame() {
   DestroyDelegatedContent();
 }
 
 void RenderWidgetHostViewAndroid::SynchronousFrameMetadata(
     cc::CompositorFrameMetadata frame_metadata) {
   if (!content_view_core_)
     return;
-
-  bool is_mobile_optimized = IsMobileOptimizedFrame(frame_metadata);
+  bool enable_force_zoom = false;
+  if (host_)
+    enable_force_zoom =
+        RenderViewHost::From(host_)->GetWebkitPreferences().force_enable_zoom;
+  bool is_mobile_optimized =
+      IsMobileOptimizedFrame(frame_metadata, enable_force_zoom);
 
   if (host_ && host_->input_router()) {
     host_->input_router()->NotifySiteIsMobileOptimized(
         is_mobile_optimized);
   }
 
   // This is a subset of OnSwapCompositorFrame() used in the synchronous
   // compositor flow.
   OnFrameMetadataUpdated(frame_metadata.Clone(), false);
 
@@ skipping 116 matching lines @@
   canvas.scale(
       (float)output_width / (float)input_size_in_pixel.width(),
       (float)output_height / (float)input_size_in_pixel.height());
   sync_compositor_->DemandDrawSw(&canvas);
   callback.Run(bitmap, READBACK_SUCCESS);
 }
 
 void RenderWidgetHostViewAndroid::OnFrameMetadataUpdated(
     const cc::CompositorFrameMetadata& frame_metadata,
     bool is_transparent) {
-  bool is_mobile_optimized = IsMobileOptimizedFrame(frame_metadata);
+  bool enable_force_zoom = false;
+  if (host_)
+    enable_force_zoom =
+        RenderViewHost::From(host_)->GetWebkitPreferences().force_enable_zoom;
+  bool is_mobile_optimized =
+      IsMobileOptimizedFrame(frame_metadata, enable_force_zoom);
   gesture_provider_.SetDoubleTapSupportForPageEnabled(!is_mobile_optimized);
 
   if (!content_view_core_)
     return;
 
   if (overscroll_controller_)
     overscroll_controller_->OnFrameMetadataUpdated(frame_metadata);
 
   if (selection_controller_) {
     selection_controller_->OnSelectionBoundsChanged(
@@ skipping 771 matching lines @@
 
   ui::WindowAndroidCompositor* compositor = window_android->GetCompositor();
   if (!compositor)
     return;
 
   overscroll_controller_ = base::MakeUnique<OverscrollControllerAndroid>(
       overscroll_refresh_handler, compositor, view_.GetDipScale());
 }
 
 }  // namespace content