Added support for glGetString, glGetShaderSource,...

gpu/command_buffer/common/gles2_cmd_format.h

Index: gpu/command_buffer/common/gles2_cmd_format.h
===================================================================
--- gpu/command_buffer/common/gles2_cmd_format.h	(revision 40176)
+++ gpu/command_buffer/common/gles2_cmd_format.h	(working copy)
@@ -93,6 +93,8 @@
   static const CommandId kCmdId = kGetAttribLocation;
   static const cmd::ArgFlags kArgFlags = cmd::kFixed;
 
+  typedef GLint Result;
+
   static uint32 ComputeSize() {
     return static_cast<uint32>(sizeof(ValueType));  // NOLINT
   }
@@ -156,6 +158,8 @@
   static const CommandId kCmdId = kGetAttribLocationImmediate;
   static const cmd::ArgFlags kArgFlags = cmd::kAtLeastN;
 
+  typedef GLint Result;
+
   static uint32 ComputeDataSize(const char* s) {
     return strlen(s);
   }
@@ -213,6 +217,8 @@
   static const CommandId kCmdId = kGetUniformLocation;
   static const cmd::ArgFlags kArgFlags = cmd::kFixed;
 
+  typedef GLint Result;
+
   static uint32 ComputeSize() {
     return static_cast<uint32>(sizeof(ValueType));  // NOLINT
   }
@@ -276,6 +282,8 @@
   static const CommandId kCmdId = kGetUniformLocationImmediate;
   static const cmd::ArgFlags kArgFlags = cmd::kAtLeastN;
 
+  typedef GLint Result;
+
   static uint32 ComputeDataSize(const char* s) {
     return strlen(s);
   }