Add Apple renderer strings to PowerVR detection

src/gpu/gl/GrGLUtil.cpp

Index: src/gpu/gl/GrGLUtil.cpp
diff --git a/src/gpu/gl/GrGLUtil.cpp b/src/gpu/gl/GrGLUtil.cpp
index 71d54c35c060ab14aad9efbf954fb43e0f74aadf..b5e58554018c0560fa9fe176eb296c06f8e7bfb6 100644
--- a/src/gpu/gl/GrGLUtil.cpp
+++ b/src/gpu/gl/GrGLUtil.cpp
@@ -261,9 +261,27 @@ GrGLRenderer GrGLGetRendererFromString(const char* rendererString) {
         if (1 == n && lastDigit >= 0 && lastDigit <= 9) {
             return kPowerVR54x_GrGLRenderer;
         }
+        // certain iOS devices also use PowerVR54x GPUs
+        static const char kAppleA4Str[] = "Apple A4";

[bsalomon, 2015/12/10 16:45:28]

I think these report PowerVR, but can't hurt

+        static const char kAppleA5Str[] = "Apple A5";
+        static const char kAppleA6Str[] = "Apple A6";
+        if (0 == strncmp(rendererString, kAppleA4Str,
+                         SK_ARRAY_COUNT(kAppleA4Str)-1) ||
+            0 == strncmp(rendererString, kAppleA5Str,
+                         SK_ARRAY_COUNT(kAppleA5Str)-1) ||
+            0 == strncmp(rendererString, kAppleA6Str,
+                         SK_ARRAY_COUNT(kAppleA6Str)-1)) {
+            return kPowerVR54x_GrGLRenderer;
+        }
         static const char kPowerVRRogueStr[] = "PowerVR Rogue";
+        static const char kAppleA7Str[] = "Apple A7";
+        static const char kAppleA8Str[] = "Apple A8";
         if (0 == strncmp(rendererString, kPowerVRRogueStr,
-                         SK_ARRAY_COUNT(kPowerVRRogueStr)-1)) {
+                         SK_ARRAY_COUNT(kPowerVRRogueStr)-1) ||
+            0 == strncmp(rendererString, kAppleA7Str,
+                         SK_ARRAY_COUNT(kAppleA7Str)-1) ||
+            0 == strncmp(rendererString, kAppleA8Str,
+                         SK_ARRAY_COUNT(kAppleA8Str)-1)) {
             return kPowerVRRogue_GrGLRenderer;
         }
         int adrenoNumber;