Implement support for rendering to 32-bit float textures on ES3

ui/gl/gl_version_info.cc

Index: ui/gl/gl_version_info.cc
diff --git a/ui/gl/gl_version_info.cc b/ui/gl/gl_version_info.cc
index a45219a11e762d7185fc55393e1cac49355a6458..996c44f22cf4fd8c9c5b85c5abb3dd5574adb757 100644
--- a/ui/gl/gl_version_info.cc
+++ b/ui/gl/gl_version_info.cc
@@ -8,7 +8,7 @@
 
 namespace gfx {
 
-GLVersionInfo::GLVersionInfo(const char* version_str)
+GLVersionInfo::GLVersionInfo(const char* version_str, const char* renderer_str)
     : is_es(false),
       is_es1(false),
       is_es2(false),
@@ -16,7 +16,8 @@ GLVersionInfo::GLVersionInfo(const char* version_str)
       is_gl1(false),
       is_gl2(false),
       is_gl3(false),
-      is_gl4(false) {
+      is_gl4(false),
+      is_angle(false) {
   if (version_str) {
     std::string lstr(StringToLowerASCII(std::string(version_str)));
     is_es = (lstr.substr(0, 9) == "opengl es");
@@ -33,6 +34,9 @@ GLVersionInfo::GLVersionInfo(const char* version_str)
       is_gl1 = !is_gl2 && !is_gl3 && !is_gl4;
     }
   }
+  if (renderer_str) {
+    is_angle = StartsWithASCII(renderer_str, "ANGLE", true);
+  }
 }
 
 }  // namespace gfx