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..60d07ee283ccef5d539cfee3af4a70ab3fa8fb92 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"
@@ -1093,6 +1094,12 @@ int BrowserMainLoop::BrowserThreadsStarted() {
   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
 #endif
 
+  // Enable the 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());
+
   {
     TRACE_EVENT0("startup", "BrowserThreadsStarted::Subsystem:AudioMan");
     audio_manager_.reset(media::AudioManager::CreateWithHangTimer(