Implementation of device metrics emulation in render view.

content/renderer/devtools/devtools_agent.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/devtools/devtools_agent.h"
 
 #include <map>
 
 #include "base/debug/trace_event.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop.h"
 #include "base/process/process.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/common/devtools_messages.h"
 #include "content/common/view_messages.h"
 #include "content/renderer/devtools/devtools_agent_filter.h"
 #include "content/renderer/devtools/devtools_client.h"
 #include "content/renderer/render_view_impl.h"
 #include "third_party/WebKit/public/platform/WebPoint.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/web/WebConsoleMessage.h"
 #include "third_party/WebKit/public/web/WebConsoleMessage.h"
 #include "third_party/WebKit/public/web/WebDevToolsAgent.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
+#include "third_party/WebKit/public/web/WebSettings.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
 #if defined(USE_TCMALLOC)
 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 #endif
 
 using WebKit::WebConsoleMessage;
 using WebKit::WebDevToolsAgent;
 using WebKit::WebDevToolsAgentClient;
 using WebKit::WebFrame;
@@ skipping 102 matching lines @@
   trace_log->SetEventCallback(cb);
   if (!!cb) {
     trace_log->SetEnabled(base::debug::CategoryFilter(
         base::debug::CategoryFilter::kDefaultCategoryFilterString),
         TraceLog::RECORD_UNTIL_FULL);
   } else {
     trace_log->SetDisabled();
   }
 }
 
+void DevToolsAgent::emulateDevice(
+    bool enabled,
+    const WebKit::WebSize& device_size,
+    const WebKit::WebRect& view_rect,
+    float device_scale_factor,
+    bool fit_to_view) {
+  RenderViewImpl* impl = static_cast<RenderViewImpl*>(render_view());
+  if (enabled && impl->webview())

[aelias_OOO_until_Jul13, 2013/10/01 08:08:22]

No need for the NULL pointer check of impl->webview(), since it's created in the
constructor.

[dgozman, 2013/10/01 15:26:10]

Done.

+    impl->webview()->settings()->setForceCompositingMode(true);
+  impl->EmulateScreenMetrics(enabled, gfx::Size(device_size),
+      gfx::Rect(view_rect), device_scale_factor, fit_to_view);
+}
+
 #if defined(USE_TCMALLOC) && !defined(OS_WIN)
 static void AllocationVisitor(void* data, const void* ptr) {
     typedef WebKit::WebDevToolsAgentClient::AllocatedObjectVisitor Visitor;
     Visitor* visitor = reinterpret_cast<Visitor*>(data);
     visitor->visitObject(ptr);
 }
 #endif
 
 void DevToolsAgent::visitAllocatedObjects(AllocatedObjectVisitor* visitor) {
 #if defined(USE_TCMALLOC) && !defined(OS_WIN)
@@ skipping 98 matching lines @@
   if (!web_view)
     return NULL;
   return web_view->devToolsAgent();
 }
 
 bool DevToolsAgent::IsAttached() {
   return is_attached_;
 }
 
 }  // namespace content