Add mojo::StrongBindingSet and use it in GeolocationServiceContext.

content/browser/android/content_view_core_impl.cc

 // Copyright 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/android/content_view_core_impl.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 346 matching lines @@
 }
 
 jint ContentViewCoreImpl::GetBackgroundColor(JNIEnv* env, jobject obj) {
   RenderWidgetHostViewAndroid* rwhva = GetRenderWidgetHostViewAndroid();
   if (!rwhva)
     return SK_ColorWHITE;
   return rwhva->GetCachedBackgroundColor();
 }
 
 void ContentViewCoreImpl::PauseOrResumeGeolocation(bool should_pause) {
-  if (should_pause)
-    web_contents_->GetGeolocationServiceContext()->PauseUpdates();
-  else
-    web_contents_->GetGeolocationServiceContext()->ResumeUpdates();
+  if (should_pause) {
+    GeolocationServiceContext::GetOrCreateForWebContents(web_contents_)
+        ->PauseUpdates();
+  } else {
+    GeolocationServiceContext* geolocation_service_context =
+        GeolocationServiceContext::FromWebContents(web_contents_);
+    if (geolocation_service_context)
+      geolocation_service_context->ResumeUpdates();
+  }
 }
 
 // All positions and sizes are in CSS pixels.
 // Note that viewport_width/height is a best effort based.
 // ContentViewCore has the actual information about the physical viewport size.
 void ContentViewCoreImpl::UpdateFrameInfo(
     const gfx::Vector2dF& scroll_offset,
     float page_scale_factor,
     const gfx::Vector2dF& page_scale_factor_limits,
     const gfx::SizeF& content_size,
@@ skipping 1073 matching lines @@
     return ScopedJavaLocalRef<jobject>();
 
   return view->GetJavaObject();
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content