[Android] Properly guard selection updates in RWHVAndroid

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 "base/android/build_info.h"
 #include "base/basictypes.h"
@@ skipping 1197 matching lines @@
   // web design, so text will be legible without zooming). Also disable
   // double tap and pinch for pages that prevent zooming in or out.
   bool has_mobile_viewport = HasMobileViewport(frame_metadata);
   bool has_fixed_page_scale = HasFixedPageScale(frame_metadata);
   gesture_provider_.SetDoubleTapSupportForPageEnabled(
       !has_fixed_page_scale && !has_mobile_viewport);
 
   if (!content_view_core_)
     return;
 
-  DCHECK(selection_controller_);
-  selection_controller_->OnSelectionBoundsChanged(
-      frame_metadata.selection_start, frame_metadata.selection_end);
+  if (selection_controller_) {
+    selection_controller_->OnSelectionBoundsChanged(
+        frame_metadata.selection_start, frame_metadata.selection_end);
+  }
 
   // All offsets and sizes are in CSS pixels.
   content_view_core_->UpdateFrameInfo(
       frame_metadata.root_scroll_offset,
       frame_metadata.page_scale_factor,
       gfx::Vector2dF(frame_metadata.min_page_scale_factor,
                      frame_metadata.max_page_scale_factor),
       frame_metadata.root_layer_size,
       frame_metadata.scrollable_viewport_size,
       frame_metadata.location_bar_offset,
@@ skipping 550 matching lines @@
   results->orientationAngle = display.RotationAsDegree();
   results->orientationType =
       RenderWidgetHostViewBase::GetOrientationTypeForMobile(display);
   gfx::DeviceDisplayInfo info;
   results->depth = info.GetBitsPerPixel();
   results->depthPerComponent = info.GetBitsPerComponent();
   results->isMonochrome = (results->depthPerComponent == 0);
 }
 
 } // namespace content