Add about:gpuhang

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/3447023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@60373 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 15 insertions, 2 deletions

diff --git a/chrome/browser/browser_about_handler.cc b/chrome/browser/browser_about_handler.cc
index 4406a31..69ad244 100644
--- a/chrome/browser/browser_about_handler.cc
+++ b/chrome/browser/browser_about_handler.cc
@@ -271,7 +271,7 @@ std::string AboutAbout() {
     html.append(kAllAboutPaths[i]);
     html.append("</a>\n");
   }
-  const char *debug[] = { "crash", "hang", "shorthang", "gpucrash" };
+  const char *debug[] = { "crash", "hang", "shorthang", "gpucrash", "gpuhang" };
   html.append("</ul><h2>For Debug</h2>");
   html.append("</ul><p>The following pages are for debugging purposes only. "
               "Because they crash or hang the renderer, they're not linked "
@@ -1160,11 +1160,15 @@ bool WillHandleBrowserAboutURL(GURL* url, Profile* profile) {
     return true;
   }
 
-  // Handle URL to crash the gpu process.
+  // Handle URLs to wreck the gpu process.
   if (LowerCaseEqualsASCII(url->spec(), chrome::kAboutGpuCrashURL)) {
     GpuProcessHost::SendAboutGpuCrash();
     return true;
   }
+  if (LowerCaseEqualsASCII(url->spec(), chrome::kAboutGpuHangURL)) {
+    GpuProcessHost::SendAboutGpuHang();
+    return true;
+  }
 
   // There are a few about: URLs that we hand over to the renderer. If the
   // renderer wants them, don't do any rewriting.
diff --git a/chrome/browser/gpu_process_host.cc b/chrome/browser/gpu_process_host.cc
index f2bba1f..f4c6164 100644
--- a/chrome/browser/gpu_process_host.cc
+++ b/chrome/browser/gpu_process_host.cc
@@ -127,6 +127,11 @@ void GpuProcessHost::SendAboutGpuCrash() {
   Get()->Send(new GpuMsg_Crash());
 }
 
+// static
+void GpuProcessHost::SendAboutGpuHang() {
+  Get()->Send(new GpuMsg_Hang());
+}
+
 bool GpuProcessHost::Send(IPC::Message* msg) {
   if (!EnsureInitialized())
     return false;
diff --git a/chrome/browser/gpu_process_host.h b/chrome/browser/gpu_process_host.h
index d885408..e4d4559 100644
--- a/chrome/browser/gpu_process_host.h
+++ b/chrome/browser/gpu_process_host.h
@@ -31,6 +31,10 @@ class GpuProcessHost : public BrowserChildProcessHost {
   // Tells the GPU process to crash. Useful for testing.
   static void SendAboutGpuCrash();
 
+  // Tells the GPU process to let its main thread enter an infinite loop.
+  // Useful for testing.
+  static void SendAboutGpuHang();
+
   // Shutdown routine, which should only be called upon process
   // termination.
   static void Shutdown();