Fix two leaks and a delete vs delete[] reported by ASAN

BUG=angleproject:1137

Change-Id: Ic654b79aa56ae0c0a24097b85ab48f5af53ca1f7
Reviewed-on: https://chromium-review.googlesource.com/295154
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

src/libANGLE/renderer/gl/glx/DisplayGLX.cpp

@@ -385,6 +385,9 @@ egl::ConfigSet DisplayGLX::generateConfigs() const
         int id = configs.add(config);
         configIdToGLXConfig[id] = glxConfig;
     }
+
+    XFree(glxConfigs);
+
     return configs;
 }
 

src/tests/gl_tests/MipmapTest.cpp

@@ -141,10 +141,10 @@ class MipmapTest : public ANGLETest
         glDeleteTextures(1, &mOffscreenTexture2D);
         glDeleteTextures(1, &mOffscreenTextureCube);
 
-        delete mLevelZeroBlueInitData;
-        delete mLevelZeroWhiteInitData;
-        delete mLevelOneInitData;
-        delete mLevelTwoInitData;
+        SafeDeleteArray(mLevelZeroBlueInitData);
+        SafeDeleteArray(mLevelZeroWhiteInitData);
+        SafeDeleteArray(mLevelOneInitData);
+        SafeDeleteArray(mLevelTwoInitData);
 
         ANGLETest::TearDown();
     }

util/x11/X11Window.cpp

@@ -305,6 +305,8 @@ bool X11Window::resize(int width, int height)
         angle::Sleep(10);
     }
 
+    delete timer;
+
     return true;
 }