Ping watchdog thread during GpuChannel destruction

gpu/command_buffer/service/texture_manager.cc

Index: gpu/command_buffer/service/texture_manager.cc
diff --git a/gpu/command_buffer/service/texture_manager.cc b/gpu/command_buffer/service/texture_manager.cc
index 54b2eafdcde9d4cdf75ca64988c4df0ee714b332..d5b765420e7b741a8fce2e4c39346e9ceefb64d1 100644
--- a/gpu/command_buffer/service/texture_manager.cc
+++ b/gpu/command_buffer/service/texture_manager.cc
@@ -27,6 +27,7 @@
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/mailbox_manager.h"
 #include "gpu/command_buffer/service/memory_tracking.h"
+#include "gpu/command_buffer/service/progress_reporter.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_state_restorer.h"
@@ -359,11 +360,19 @@ TextureManager::~TextureManager() {
       this);
 }
 
-void TextureManager::Destroy(bool have_context) {
+void TextureManager::Destroy(bool have_context,
+                             ProgressReporter* progress_reporter) {
   have_context_ = have_context;
-  textures_.clear();
+
+  while (!textures_.empty()) {
+    textures_.erase(textures_.begin());
+    if (progress_reporter)
+      progress_reporter->ReportProgress();
+  }
   for (int ii = 0; ii < kNumDefaultTextures; ++ii) {
     default_textures_[ii] = NULL;
+    if (progress_reporter)
+      progress_reporter->ReportProgress();
   }
 
   if (have_context) {