content: Add GpuMemoryBuffer MemoryDumpProvider implementation.

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index f5b0f188e13e5a8b4964e96f7e5e2632aa25c3d0..e178d230d826dbbbfe171c43ec4bddff546327af 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -28,6 +28,7 @@
 #include "content/browser/download/save_file_manager.h"
 #include "content/browser/gamepad/gamepad_service.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
+#include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
 #include "content/browser/gpu/compositor_util.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
@@ -1081,6 +1082,11 @@ int BrowserMainLoop::BrowserThreadsStarted() {
     established_gpu_channel = always_uses_gpu = false;
   }
   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
+  // Register GpuMemoryBuffer dump provider with IO thread affinity. Note that
+  // unregistration happens on the IO thread (See
+  // BrowserProcessSubThread::IOThreadPreCleanUp).
+  base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
+      BrowserGpuMemoryBufferManager::current(), io_thread_->task_runner());
   ImageTransportFactory::Initialize();
 #if defined(USE_AURA)
   if (aura::Env::GetInstance()) {