Ping watchdog thread during GpuChannel destruction

gpu/command_buffer/service/shader_manager.cc

Index: gpu/command_buffer/service/shader_manager.cc
diff --git a/gpu/command_buffer/service/shader_manager.cc b/gpu/command_buffer/service/shader_manager.cc
index 94ffe42ce4de5a2d82a0d367b8a191734bcd9fb3..beab27281f25906723cb124d42ca1be9da492d7d 100644
--- a/gpu/command_buffer/service/shader_manager.cc
+++ b/gpu/command_buffer/service/shader_manager.cc
@@ -10,6 +10,7 @@
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
+#include "gpu/command_buffer/service/progress_reporter.h"
 
 namespace gpu {
 namespace gles2 {
@@ -273,13 +274,16 @@ ShaderManager::~ShaderManager() {
   DCHECK(shaders_.empty());
 }
 
-void ShaderManager::Destroy(bool have_context) {
+void ShaderManager::Destroy(bool have_context,
+                            ProgressReporter* progress_reporter) {
+  DCHECK(progress_reporter);
   while (!shaders_.empty()) {
     if (have_context) {
       Shader* shader = shaders_.begin()->second.get();
       shader->Destroy();
     }
     shaders_.erase(shaders_.begin());
+    progress_reporter->ReportProgress();
   }
 }