Implement support for using GL ES 3.0 with command buffer

src/gpu/gl/GrGLInterface.cpp

Index: src/gpu/gl/GrGLInterface.cpp
diff --git a/src/gpu/gl/GrGLInterface.cpp b/src/gpu/gl/GrGLInterface.cpp
index c09efae2b88bd87007efdcfdda0209fd368d44f2..53911bfcc9f13af1d6e0acff2b0dad1e8ae1b8c7 100644
--- a/src/gpu/gl/GrGLInterface.cpp
+++ b/src/gpu/gl/GrGLInterface.cpp
@@ -216,6 +216,15 @@ bool GrGLInterface::validate() const {
     if (GR_GL_INVALID_VER == glVer) {
         RETURN_FALSE_INTERFACE
     }
+    // TODO: Remove this once command buffer implements full ES3.
+    bool ALLOW_MISSING_FUNCTIONS_FOR_INCOMPLETE_COMMAND_BUFFER_ES3 = false;
+    if (kGLES_GrGLStandard == fStandard && glVer >= GR_GL_VER(3,0)) {
+        const GrGLubyte* rendererUByte;
+        GR_GL_CALL_RET(this, rendererUByte, GetString(GR_GL_RENDERER));
+        const char* renderer = reinterpret_cast<const char*>(rendererUByte);
+        ALLOW_MISSING_FUNCTIONS_FOR_INCOMPLETE_COMMAND_BUFFER_ES3 =
+                0 == strcmp(renderer, "Chromium");
+    }
 
     // Now check that baseline ES/Desktop fns not covered above are present
     // and that we have fn pointers for any advertised fExtensions that we will
@@ -306,8 +315,10 @@ bool GrGLInterface::validate() const {
             }
         }
     } else if (glVer >= GR_GL_VER(3,0) || fExtensions.has("GL_EXT_texture_storage")) {
-        if (nullptr == fFunctions.fTexStorage2D) {
-            RETURN_FALSE_INTERFACE
+        if (!ALLOW_MISSING_FUNCTIONS_FOR_INCOMPLETE_COMMAND_BUFFER_ES3) {
+            if (nullptr == fFunctions.fTexStorage2D) {
+                RETURN_FALSE_INTERFACE
+            }
         }
     }
 
@@ -480,9 +491,11 @@ bool GrGLInterface::validate() const {
     if (glVer >= GR_GL_VER(3,0) ||
         (kGLES_GrGLStandard == fStandard && fExtensions.has("GL_EXT_map_buffer_range")) ||
         (kGL_GrGLStandard == fStandard && fExtensions.has("GL_ARB_map_buffer_range"))) {
-        if (nullptr == fFunctions.fMapBufferRange ||
-            nullptr == fFunctions.fFlushMappedBufferRange) {
-            RETURN_FALSE_INTERFACE;
+        if (!ALLOW_MISSING_FUNCTIONS_FOR_INCOMPLETE_COMMAND_BUFFER_ES3) {
+            if (nullptr == fFunctions.fMapBufferRange ||
+                nullptr == fFunctions.fFlushMappedBufferRange) {
+                RETURN_FALSE_INTERFACE;
+            }
         }
     }
 
@@ -562,14 +575,16 @@ bool GrGLInterface::validate() const {
                 nullptr == fFunctions.fDrawElementsInstanced) {
                 RETURN_FALSE_INTERFACE
             }
-        }    
+        }
     } else if (kGLES_GrGLStandard == fStandard) {
-        if (glVer >= GR_GL_VER(3,0) || fExtensions.has("GL_EXT_draw_instanced")) {
-            if (nullptr == fFunctions.fDrawArraysInstanced ||
-                nullptr == fFunctions.fDrawElementsInstanced) {
-                RETURN_FALSE_INTERFACE
+        if (!ALLOW_MISSING_FUNCTIONS_FOR_INCOMPLETE_COMMAND_BUFFER_ES3) {
+            if (glVer >= GR_GL_VER(3,0) || fExtensions.has("GL_EXT_draw_instanced")) {
+                if (nullptr == fFunctions.fDrawArraysInstanced ||
+                    nullptr == fFunctions.fDrawElementsInstanced) {
+                    RETURN_FALSE_INTERFACE
+                }
             }
-        }    
+        }
     }
 
     if (kGL_GrGLStandard == fStandard) {
@@ -577,13 +592,15 @@ bool GrGLInterface::validate() const {
             if (nullptr == fFunctions.fVertexAttribDivisor) {
                 RETURN_FALSE_INTERFACE
             }
-        }    
+        }
     } else if (kGLES_GrGLStandard == fStandard) {
-        if (glVer >= GR_GL_VER(3,0) || fExtensions.has("GL_EXT_instanced_arrays")) {
-            if (nullptr == fFunctions.fVertexAttribDivisor) {
-                RETURN_FALSE_INTERFACE
+        if (!ALLOW_MISSING_FUNCTIONS_FOR_INCOMPLETE_COMMAND_BUFFER_ES3) {
+            if (glVer >= GR_GL_VER(3,0) || fExtensions.has("GL_EXT_instanced_arrays")) {
+                if (nullptr == fFunctions.fVertexAttribDivisor) {
+                    RETURN_FALSE_INTERFACE
+                }
             }
-        }    
+        }
     }
 
     if ((kGL_GrGLStandard == fStandard && glVer >= GR_GL_VER(4,3)) ||