[DevTools] Add canProfilePower command and plumb power handlers to RenderViewDevToolsAgentHost

BUG=337138

Review URL: https://codereview.chromium.org/190443002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255845 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/devtools/devtools_power_handler.cc

@@ -23,6 +23,9 @@ DevToolsPowerHandler::DevToolsPowerHandler() {
   RegisterCommandHandler(devtools::Power::end::kName,
                          base::Bind(&DevToolsPowerHandler::OnEnd,
                                     base::Unretained(this)));
+  RegisterCommandHandler(devtools::Power::canProfilePower::kName,
+                         base::Bind(&DevToolsPowerHandler::OnCanProfilePower,
+                                    base::Unretained(this)));
 }
 
 DevToolsPowerHandler::~DevToolsPowerHandler() {
@@ -69,4 +72,14 @@ DevToolsPowerHandler::OnEnd(scoped_refptr<DevToolsProtocol::Command> command) {
   return command->InternalErrorResponse("Power profiler service unavailable");
 }
 
+scoped_refptr<DevToolsProtocol::Response>
+DevToolsPowerHandler::OnCanProfilePower(
+    scoped_refptr<DevToolsProtocol::Command> command) {
+  base::DictionaryValue* result = new base::DictionaryValue();
+  result->SetBoolean(devtools::kResult,
+                     PowerProfilerService::GetInstance()->IsAvailable());
+
+  return command->SuccessResponse(result);
+}
+
 }  // namespace content

content/browser/devtools/devtools_power_handler.h

@@ -27,6 +27,8 @@ class DevToolsPowerHandler
       scoped_refptr<DevToolsProtocol::Command> command);
   scoped_refptr<DevToolsProtocol::Response> OnEnd(
       scoped_refptr<DevToolsProtocol::Command> command);
+  scoped_refptr<DevToolsProtocol::Response> OnCanProfilePower(
+      scoped_refptr<DevToolsProtocol::Command> command);
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsPowerHandler);
 };

content/browser/devtools/render_view_devtools_agent_host.cc

@@ -8,6 +8,7 @@
 #include "base/lazy_instance.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/devtools/devtools_manager_impl.h"
+#include "content/browser/devtools/devtools_power_handler.h"
 #include "content/browser/devtools/devtools_protocol.h"
 #include "content/browser/devtools/devtools_protocol_constants.h"
 #include "content/browser/devtools/devtools_tracing_handler.h"
@@ -139,7 +140,8 @@ RenderViewDevToolsAgentHost::RenderViewDevToolsAgentHost(
     RenderViewHost* rvh)
     : render_view_host_(NULL),
       overrides_handler_(new RendererOverridesHandler(this)),
-      tracing_handler_(new DevToolsTracingHandler())
+      tracing_handler_(new DevToolsTracingHandler()),
+      power_handler_(new DevToolsPowerHandler())
  {
   SetRenderViewHost(rvh);
   DevToolsProtocol::Notifier notifier(base::Bind(
@@ -147,6 +149,7 @@ RenderViewDevToolsAgentHost::RenderViewDevToolsAgentHost(
       base::Unretained(this)));
   overrides_handler_->SetNotifier(notifier);
   tracing_handler_->SetNotifier(notifier);
+  power_handler_->SetNotifier(notifier);
   g_instances.Get().push_back(this);
   AddRef();  // Balanced in RenderViewHostDestroyed.
 }
@@ -166,6 +169,8 @@ void RenderViewDevToolsAgentHost::DispatchOnInspectorBackend(
         overrides_handler_->HandleCommand(command);
     if (!overridden_response)
       overridden_response = tracing_handler_->HandleCommand(command);
+    if (!overridden_response)
+      overridden_response = power_handler_->HandleCommand(command);
     if (overridden_response) {
       if (!overridden_response->is_async_promise())
         OnDispatchOnInspectorFrontend(overridden_response->Serialize());

content/browser/devtools/render_view_devtools_agent_host.h

@@ -22,6 +22,7 @@ class CompositorFrameMetadata;
 
 namespace content {
 
+class DevToolsPowerHandler;
 class DevToolsTracingHandler;
 class RendererOverridesHandler;
 class RenderViewHost;
@@ -95,6 +96,7 @@ class CONTENT_EXPORT RenderViewDevToolsAgentHost
   RenderViewHost* render_view_host_;
   scoped_ptr<RendererOverridesHandler> overrides_handler_;
   scoped_ptr<DevToolsTracingHandler> tracing_handler_;
+  scoped_ptr<DevToolsPowerHandler> power_handler_;
 #if defined(OS_ANDROID)
   scoped_ptr<PowerSaveBlockerImpl> power_save_blocker_;
 #endif