Resize DevTools target frames.

components/devtools_discovery/devtools_discovery_manager.cc

Index: components/devtools_discovery/devtools_discovery_manager.cc
diff --git a/components/devtools_discovery/devtools_discovery_manager.cc b/components/devtools_discovery/devtools_discovery_manager.cc
index 3c472fa7bfbc1c9894db48d653a24086ca079d89..4d3a039cd3b9ca6b014296e68534213db38d1e7a 100644
--- a/components/devtools_discovery/devtools_discovery_manager.cc
+++ b/components/devtools_discovery/devtools_discovery_manager.cc
@@ -7,8 +7,12 @@
 #include "base/stl_util.h"
 #include "components/devtools_discovery/basic_target_descriptor.h"
 #include "content/public/browser/devtools_agent_host.h"
+#include "content/public/browser/render_widget_host_view.h"
+#include "content/public/browser/web_contents.h"
 
 using content::DevToolsAgentHost;
+using content::WebContents;
+using content::RenderWidgetHostView;
 
 namespace devtools_discovery {
 
@@ -63,9 +67,9 @@ DevToolsDiscoveryManager::GetDescriptorsFromProviders() {
 }
 
 std::unique_ptr<base::DictionaryValue>
-DevToolsDiscoveryManager::HandleNewTargetCommand(
+DevToolsDiscoveryManager::HandleCreateTargetCommand(
     base::DictionaryValue* command_dict) {
-  int id;
+  int id, width, height;
   std::string method;
   std::string url;
   const base::DictionaryValue* params_dict = nullptr;
@@ -78,6 +82,19 @@ DevToolsDiscoveryManager::HandleNewTargetCommand(
         CreateNew(GURL(url));
     if (!descriptor)
       return nullptr;
+
+    // Set size of WebContents by resizing RWHV if available
+    if (command_dict->GetInteger("width", &width) && width >= 0 &&
+        command_dict->GetInteger("height", &height) && height >= 0) {
+      scoped_refptr<DevToolsAgentHost> agent_host = descriptor->GetAgentHost();
+      WebContents* web_contents =
+          agent_host ? agent_host->GetWebContents() : nullptr;
+      RenderWidgetHostView* view =
+          web_contents ? web_contents->GetRenderWidgetHostView() : nullptr;
+      if (view)
+        view->SetSize(gfx::Size(width, height));
+    }
+
     std::unique_ptr<base::DictionaryValue> result(new base::DictionaryValue());
     result->SetInteger("id", id);
     std::unique_ptr<base::DictionaryValue> cmd_result(