Ping watchdog thread during GpuChannel destruction

gpu/command_buffer/service/program_manager.cc

Index: gpu/command_buffer/service/program_manager.cc
diff --git a/gpu/command_buffer/service/program_manager.cc b/gpu/command_buffer/service/program_manager.cc
index 754d5b0630b16d7d450787076dbbfbfd6b3fb257..7b08b19097c29376d544e7f15a4c6b943db641bd 100644
--- a/gpu/command_buffer/service/program_manager.cc
+++ b/gpu/command_buffer/service/program_manager.cc
@@ -28,6 +28,7 @@
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/gpu_preferences.h"
 #include "gpu/command_buffer/service/program_cache.h"
+#include "gpu/command_buffer/service/progress_reporter.h"
 #include "gpu/command_buffer/service/shader_manager.h"
 #include "third_party/re2/src/re2/re2.h"
 #include "ui/gl/gl_version_info.h"
@@ -2452,14 +2453,14 @@ Program::~Program() {
   }
 }
 
-ProgramManager::ProgramManager(
-    ProgramCache* program_cache,
-    uint32_t max_varying_vectors,
-    uint32_t max_draw_buffers,
-    uint32_t max_dual_source_draw_buffers,
-    uint32_t max_vertex_attribs,
-    const GpuPreferences& gpu_preferences,
-    FeatureInfo* feature_info)
+ProgramManager::ProgramManager(ProgramCache* program_cache,
+                               uint32_t max_varying_vectors,
+                               uint32_t max_draw_buffers,
+                               uint32_t max_dual_source_draw_buffers,
+                               uint32_t max_vertex_attribs,
+                               const GpuPreferences& gpu_preferences,
+                               FeatureInfo* feature_info,
+                               ProgressReporter* progress_reporter)
     : program_count_(0),
       have_context_(true),
       program_cache_(program_cache),
@@ -2468,7 +2469,10 @@ ProgramManager::ProgramManager(
       max_dual_source_draw_buffers_(max_dual_source_draw_buffers),
       max_vertex_attribs_(max_vertex_attribs),
       gpu_preferences_(gpu_preferences),
-      feature_info_(feature_info) {}
+      feature_info_(feature_info),
+      progress_reporter_(progress_reporter) {
+  DCHECK(progress_reporter_);
+}
 
 ProgramManager::~ProgramManager() {
   DCHECK(programs_.empty());
@@ -2479,7 +2483,10 @@ void ProgramManager::Destroy(bool have_context) {
 
   ProgramDeletionScopedUmaTimeAndRate scoped_histogram(
       base::saturated_cast<int32_t>(programs_.size()));
-  programs_.clear();
+  while (!programs_.empty()) {
+    programs_.erase(programs_.begin());
+    progress_reporter_->ReportProgress();
+  }
 }
 
 void ProgramManager::StartTracking(Program* /* program */) {