gpu: Update ANGLE Platform integration.

ui/gl/angle_platform_impl.h

Index: ui/gl/angle_platform_impl.h
diff --git a/ui/gl/angle_platform_impl.h b/ui/gl/angle_platform_impl.h
index 99c59a6c0bb2ee6e265767d15e204f5764727748..38c93ab678a1261808c39edb42a888963d11f381 100644
--- a/ui/gl/angle_platform_impl.h
+++ b/ui/gl/angle_platform_impl.h
@@ -8,53 +8,12 @@
 // Implements the ANGLE platform interface, for functionality like
 // histograms and trace profiling.
 
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "third_party/angle/include/platform/Platform.h"
-#include "ui/gl/gl_export.h"
+#include "ui/gl/gl_context_egl.h"
 
 namespace gl {
 
-// Derives the base ANGLE platform and provides implementations
-class GL_EXPORT ANGLEPlatformImpl : NON_EXPORTED_BASE(public angle::Platform) {
- public:
-  ANGLEPlatformImpl();
-  ~ANGLEPlatformImpl() override;
-
-  // angle::Platform:
-  double currentTime() override;
-  double monotonicallyIncreasingTime() override;
-  void logError(const char* errorMessage) override;
-  void logWarning(const char* warningMessage) override;
-  const unsigned char* getTraceCategoryEnabledFlag(
-      const char* category_group) override;
-  TraceEventHandle addTraceEvent(char phase,
-                                 const unsigned char* category_group_enabled,
-                                 const char* name,
-                                 unsigned long long id,
-                                 double timestamp,
-                                 int num_args,
-                                 const char** arg_names,
-                                 const unsigned char* arg_types,
-                                 const unsigned long long* arg_values,
-                                 unsigned char flags) override;
-  void updateTraceEventDuration(const unsigned char* category_group_enabled,
-                                const char* name,
-                                TraceEventHandle handle) override;
-  void histogramCustomCounts(const char* name,
-                             int sample,
-                             int min,
-                             int max,
-                             int bucket_count) override;
-  void histogramEnumeration(const char* name,
-                            int sample,
-                            int boundary_value) override;
-  void histogramSparse(const char* name, int sample) override;
-  void histogramBoolean(const char* name, bool sample) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ANGLEPlatformImpl);
-};
+bool InitializeANGLEPlatform(EGLDisplay display);
+void ResetANGLEPlatform(EGLDisplay display);
 
 }  // namespace gl